Here’s the presentation from last night
If anyone wants me to send it direct to them, let me know. Mike Wall has already said that
Here’s the presentation from last night
If anyone wants me to send it direct to them, let me know. Mike Wall has already said that
As you’ll have gathered, Andy got me an old LOMO Biolam microscope for Christmas. Included in the sale were an assortment of extras ‘upgrades’ (all in their own wooden boxes) to the original base unit (most I don’t think have ever been used), including a binocular head with a pair of x7 and x10 eyepieces.
Being 41 years old, it needed some TLC – the main issue being the infamous ‘Russian Tank Grease’ originally used!
You can tell it’s age as the serial number contains it’s year of manufacture – just like Takahashi do, so the ’77’ is 1977.
This instrument is still a ‘LOMO’ version, later, it was also made and marketed under the Zenith brand (we used their cameras at art college!)
Over time, this grease has solidified (think your bonfire toffee apples), so most things that were supposed to move were either very stiff or just plain stuck.
Not being very ‘DIY’, I’ve spent the last few weeks tentatively stripping it down and soaking various parts in white spirit and WD40.
Andy came round just after Christmas and we had ‘first light’ – this image is of a Lilly Ovary, iPhone 6 held up to the 10x eyepiece in the Binocular attachment (adds 1.5x mag) and a 20x objective (so 300x)
It was pretty tricky to achieve focus as the main (coarse focuser) was lumpy and the fine focus unit inoperable….
The microscope (thankfully) turned out to be pretty easy to take apart.
Below, the main/coarse focus unit (after spending a week in a bath of white spirit). Brushed clean with my old tooth brush and re-greased with a modern silicon alternative.
Image below – bottom of the ‘stage base’ – the bit where you place your slide (‘rotating stage’ also stuck!) This shows the silver-grey fine focuser mounted on the side.
Most of the microscope is cast metal and brass. The only plastic part was this strip of gearing for the condenser (the unit that focuses the light source onto the slide/specimen). The two screws though caught me out – the top being countersunk and the lower a pan-head!
The brass is ‘pre-polished’….
Below images (x2) – back of same ‘stage’ part….
…..and with gearing removed….
The biggest issue was the fine focuser. The actual unit is self contained, like the inside of a watch and ‘runs- dry’ – so no grease. Whilst it worked on it’s own, I could not get the fine focus to work once everything was reassembled…
The large metal pin (above) sits in that circular recess shown below in the middle of that brass piece. Inside the main cavity sits the fine focuser which mates to the fine focus gearing/knob just seen in the shadow right at the back.
It turned out that the brass part (with circular recess) is supposed to freely move up and down with a turn of the fine focuser…
….the movement dampened by a large spring that sits inside this circular recess on the other side (top). The spring is held in place under tension by the serial number ‘date’ cover shown earlier.
Once we had worked out how this works Andy………. hit it…… (carefully) with a hammer….(!!!) after judisious use of WD40. That freed the brass dovetail allowing cleaning, polishing and re-greasing…
41 years of grease (finally) removed !
Amazing what a bit of Brass can do!
Once all back together everything finally worked!
Andy headed off and I finished polishing up the chrome objective head and attaching the X/Y upgrade to the stage.
Later in the evening I popped over to Andy’s to try the microscope out. I still have the condenser upgrade to sort (Russian tank grease again) and then sort an LED / Halogen illuminator to replace the 15w bulb version (itself an upgrade over the supplied mirror).
Andy’s calibration slide – each line is 0.01mm apart.
ET’s hand !
I’ve been experimenting with the All Sky camera setup to try and extend the total exposure time for an exposure. One limiting factor is the camera firmware which limits exposure to 1 second.
The way that iSpy gets the images from the camera is using a combination of RTSP (Real Time Streaming Protocol). The command line for that is the funny string of characters you entered when first setting up the camera (rtsp://admin:@192.168.1.253:554/mpeg4)
This is then passed into iSpy via FFMPEG software, which is basically a communications interface. Here’s where I’ve made a discovery. I can change the command line to allow frame integration of 2,4 or 16 frames i.e. 2s, 4s, 16s exposure.
I still have a little more playing about to do before I release the command line but it looks promising. The FFMPEG documentation is a nightmare but it’s incredibly powerful
Watch this space……………….
New year celebrations caught by the all sky camera.
Below are the daily and hourly meteor counts for December, the peaks for the Geminids and Ursids are clearly shown. Unfortunately Graves went off line between 20:00 on 13/12/17 and 08:00 on 14/12/17. The increase in activity on 31st is beginning of Quadrantids, which will be peaking on the 3/4 Jan.
Here is a comparison with December 2016, Graves went off line last December for most of the 29th Dec.
This final plot shows the daily meteor activity throughout 2017, the major showers are marked, for more information on meteor showers go to http://meteorshowersonline.com/
Happy New Year
Following pictures show astronomy-related presents I received this Christmas – in particular the amazing framed American eclipse stamps from Damian and the beer from Ean Ean.
The beer glass says, “I love you to the moon and back”.
The beer is brewed by “Meantime Brewing” at Greenwich, London.
On the 21st June I set up my solargraph, this had a0.3mm laser drilled hole ( as supplied by the pinhole factory, also resistant to bird attack ( although I’ve had no problems previously)
It was sat on the end of my raspberry canes on the allotment.
On the 21st Dec I removed it , opened it up in a dark room with a red light and placed on Epson scanner, scanned at 1200dpi, in colour and saved as a .tif file for processing in Photoshop, see image below, had to repeat scan as first image contained some very strange artifacts, tinsely bits from scanning the Christmas card from Rosliston forestry centre!
Then it was processed in Photoshop CS6, first flipping horizontally to put image right way round and then inverting the played with levels, curves contrast and exposure, final image below, with camera view for comparison beside it. ( enlarge solar graph, shows detail better.)
Happy Solstice- Pete Hill
Six months has flown by….
Time to collect the solargraph we ‘planted’…
Yes, a few days early to be collecting, but today is my last one in the office and I wasn’t thinking of doing a 124 mile round trip to collect from Leominster on the shortest day!
What a lovely start to the day, a slippy stile and muddy walk!
If you remember from the last post, the first attempt had been damaged – probably due to the shiny ‘foil’ pinhole being pecked out by an interested magpie!
2x previous photos of new solargraph in situ…(Above and below)
The site from Google Maps:
Kimbolton Church (Nr. Leominster) is in the centre. The solar graph is sited in that first tree-line (towards 10/11 o’clock), looking back to the church – thought it would make a nice view/foreground…
This time, we had forgone the foil (you pin-prick it to get a fine hole and therefore sharper image recorded) and instead drilled (No 1 drill bit), straight into the tin. No bird was going to get through that!!
Would this one fair better…?
This was it’s rough view as seen this morning upon collection at 8.45am….
First impressions were good… the baked bean can pinhole camera looked to have survived it’s six months and was in remarkably good condition with hardly any rust – sheltered under the trees.
Back at the office, second impressions were of an unremarkable small image and some image shift (double exposure)…. look how the church is double exposed on the original below…. ;-(
I don’t think it was ‘vandalised’ if it had, it would have been ripped out and strewn across the hedgerow… ‘Mother Nature’…. perhaps…? More likely a horse or sheep rubbing up against the stake (or wire fence) – although I did try and protect it somewhat…
(Above: Initial scan – 900DPI, Colour-Millions, mirror reversed on the horizontal plane, cropped).
If this hasn’t worked, that’s 18 months from the first try (summer>winter 2016) – I didn’t have another pinhole camera prepared after the first go to put imediately back in place, so waited until this summer solstice in 2017 to try again.
Again, I didn’t have another prepared to start again this morning either, so another camera would have to wait until summer 2018….
With a little Photoshop magic, it’s amazing what can be achieved!
So, KIMBOLTON CHURCH SOLARGRAPH Summer > Winter 2017
For January’s RAG end-month meeting, I’ll bring the laptop, scanner, etc. So if you tried your own solargraph and want some help processing it, bring it along and we can have a play!
If you want to preserve yours until then, I suggest you remove from the tin, ***dry completely with a hairdryer*** and then put nice and flat inside an envelope (or two) out of direct light.
Wishing you all a Merry Christmas!
Observing Log 15/12/2017 @ 22:36 – 16/12/2017 @ 02:04.
Andy & Damian
What a night! Incredible views from the centre of Lichfield – we can only imagine what the views must have been like from a dark sky sight. Tonight, we saw things we have never seen before – at least by eye – and only ever expected to see on photograhpic images. Wow! Just goes to show – it is worth going outside in the freezing cold.
Photos through image intensified eyepiece (IS):
Orion Nebula (M42):
M81 and M82 Galaxies in Ursa Major (below) – note that the Image Intensified eyepiece has significant field curvature and coma towards the edges of the field so the thin smudge of the top left of this image is not another galaxy but a spread-out star:
Double Cluster in Perseus (below):
Orion Nebula – Messier 42, Bright Nebula in Orion,15 Dec 2017, 22:36:35, Using my ten-inch Orion Dob in my back garden, standing in the snow, after tripping over the remains of the snowman built by Rhys and Hannah, and survived the treacherous and very slippery icy steps (and having put salt on them to keep myself alive), my first target was Orion’s nebula. Magnificent and stretching over half the field of view in my 14mm Explore Scientific (ES) 100-degree AFOV eyepiece. My eyes are poorly dark adapted, but the nebula looks green rather than grey tonight, suggesting the sky is very clear after the snow falls.
NGC 1975, Bright Nebula in Orion, 15 Dec 2017, 22:42:48, Visible other side of the fish-mouth, little detail visible.
Flame Nebula – NGC 2024, Bright Nebula in Orion,15 Dec 2017, 23:00:41, Definite observation of the Flame Nebula nebulosity. Once our eyes were relaxed, we could see filaments and tendrils over 1+ fields of view growing in brightness towards the main part of the Flame Nebula. Realised again it is a question of learning to observe this very faint object.
Messier 78, Bright Nebula in Orion,15 Dec 2017, 23:04:08, First ever observation of M78. Two stars with definite nebulosity. I thought it was an open cluster at first, but Damian realised what it was, and we star hopped around the area to confirm it.
Orion Nebula – Messier 42, Bright Nebula in Orion,15 Dec 2017, 23:05:20, Image intensified eyepiece – we could see tendrils curling around in circle behind M42 from tips of the wings of the nebula, these were not obviously visible in ES eyepiece. M43 also showed more detail in image intensified eyepiece BUT we could not see the Flame nebula in the image intensified eyepiece.
Messier 78, Bright Nebula in Orion,15 Dec 2017, 23:07:31, Seen in image intensified eyepiece (IS) but nebulosity less obvious (although still visible) than in ES.
Barnard’s Loop – Sharpless 2-276, Bright Nebula in Orion,15 Dec 2017, 23:25:05, I thought I could follow part of this – a C-shaped lightening as a strip at centre field of view – which I followed upwards and then right on to right in next field of view. Damian was not convinced so we will call this a possible observation only……
NGC 2244, Open Cluster in Monoceros, 15 Dec 2017, 23:29:33, First seen as definite smudge in Vixen 2.1x binoculars by myself! I am doing well tonight, as I have seen first most observations above. Damian mentioned NGC 2244 in his talk at RAG end last month. These Vixen binoculars are really growing on me as they do such a good job of identifying such objects. In ten-inch with 14mm ES, we saw definite structure in the Rosette Nebula itself and not just the star cluster. Wow! What a night! And from the centre of Lichfield. But it does require one of the clearest skies we have ever seen. In the IS only the stars of the cluster could be seen and not the nebulosity. This appears to show that the IS responds very poorly to very faint diffuse objects.
Messier 35, Open Cluster in Gemini,16 Dec 2017, 00:39:12, Damian tried out my Skywatcher Equinox Pro on his William Optics EzTouch alt-az mount. He found M35 with his Nagler 31mm, one of the most famous eyepieces of all time.
Pleiades – Messier 45, Open Cluster in Taurus,16 Dec 2017, 00:41:34, In 80mm with 31mm Nagler, masses space around stars just like binocular view. Never seen like this in telescope. Like binocular view -magnification 500mm/31mm = 16x magnification with excellent field of view much better than most binoculars.
Double Cluster – NGC 869, Open Cluster in Perseus,16 Dec 2017, 00:44:33, Likewise with 80mm Equinox and 31mm Nagler this gives excellent binocular view without aberration unlike most binoculars. Obvious uni-ocular view.
Stock 2, Open Cluster in Cassiopeia,16 Dec 2017, 00:49:03,80mm Equinox plus 31mm Nagler best view to view this. Looks like a man with Double Cluster at edge of field of view.
Double Cluster – NGC 869, Open Cluster in Perseus,16 Dec 2017, 00:50:17, Every bit of kit has its place. That includes a ten inch Dob with 20mm ES -spectacular!
Pinwheel Cluster – Messier 36, Open Cluster in Auriga,16 Dec 2017, 00:53:12, What a way to pan M36/37/38 in Auriga – the 80mm Equnix+31mm Nagler. Wow! Wow! Wow!
Pinwheel Cluster – Messier 36, Open Cluster in Auriga,16 Dec 2017, 00:54:39, Throw away the 80mm binoculars!
Double Cluster – NGC 884, Open Cluster in Perseus,16 Dec 2017, 00:55:41, Lovely view through 80mm Equinox with 14mm ES. More magnified at 37.5x although of course will not match light gathering and therefore brilliant diamond like quality of ten inch Dob. But 80mm is a lot more grab and go. Damian thinking of something similar for American trip in 2019.
IC 1805, Open Cluster in Cassiopeia,16 Dec 2017, 01:04:47, Started by identifying the cluster and checking it was correct by panning around and checking location. Once this was certain started looking for Heart Nebula.
Heart Nebula – IC 1805, Bright Nebula in Cassiopeia,16 Dec 2017, 01:05:59, Once we identified cluster we could then identify nebulosity. This is certain observation with tendrils of nebulosity evident. However, one criticism is applicable. If we did not know from or planetarium maps that this was the correct location could we be sure this nebulosity was not background star fields, too faint to resolve individual stars? Answer is we couldn’t as brightness only slightly different from elsewhere but once location established fact is we could see the nebulosity with certainty. Is this only going to be tonight when sky so clear? Possibly but in fact it is starting to mist up now so perhaps this is part of the skill-set l-learning to recognize things for what they are in the sky. Note all our observations so far have been by direct vision. Averted vision has not been required so far tonight.
Soul Nebula – IC 1848, Bright Nebula in Cassiopeia,16 Dec 2017, 01:13:01, Adjacent to Heart Nebula, also seen initially via cluster stars. Again, once identified, we could then start to see the nebulosity – becoming more obvious as we spent more time observing it – particularly one bright patch. Both Heart and Soul Nebula seen with ten inch and 20mm ES.
Messier 65, Spiral Galaxy in Leo,16 Dec 2017, 01:22:28, Failed to find these,
Bode’s Nebulae – Messier 81, Spiral Galaxy in Ursa Major,16 Dec 2017, 01:23:00, Neat little objects in centre of field inn 80mm – of M81/82 and M42 – with 31mm Nagler.
Damian then changed to 6mm Ethos for M42 inn 80mm. Masses of detail. Quite bright. The combination of Equinox and WO mount seems to work well.
Orion Nebula – Messier 42, Bright Nebula in Orion,16 Dec 2017, 01:37:54,80mm through IS M42 bright but M43 not visible. Smaller image means less affected by field curvature and coma inherent in the IS.
Finished observing @ 02:04 – sky too misty and its too cold and my secondary has fogged up!
About £70 and you’ll get a unit that really works with the Synscan Pro ( eq mount) or the Synscan ( az mount ) free app for android or phone. You get two connecting cables , one for an eq mount and the other for an az mount. The unit is powered by the mount and connects directly into the handset socket on the mount. Note that it does draw a bit of power , make allowance in the cold with a battery or power pack.You’ll need an handset socket adapter cable for the eq6 mount. Otherwise you can plug it into another SW mount.
Level and polar align, switch on power and connect to the local wi fi that comes up on your device settings. No need to add time of location. There’s a polar clock as well. The built in gps is very fast. Then Align . You can easily set the direction speed. Up and right directions light up to endure that you finish your alignment with these two directions. Then select your menu , Messier’s , ngc , IC and Caldwells. There’s named stars , tonight’s best and double stars. There’s also user objects , you can put in your own ra and Dec ( easier with a screen stilo ), it’ll store 25 of these.
There’s PEC , backlash etc. There’s even solar , lunar etc. tracking options. Accuracy ? I was really shocked. As good as my recent V4 handset. It appears that PAE is continual with a press on the star button. There are other features , “point and go” . Point your phone at area of sky, press and the scope will move there. ( not through space !)
For the money it’s not a punt , toy or a gadget. It’s a really viable upgrade to using or replacing a handset. At the moment there’s no easy way of using Sky Safari Pro with it ,( Southern stars have their own unit) but the phone app is straight forward to use. There are alternatives at twice the price and it’s a big thumbs up for SW .
Love this unit and can really recommend it for your Synscan mount. There’s a long review on Youtube.