Posting Large Images

I suspect I may have a LOT slower internet connection than most RAG members, and one problem I have is that large photos take a very long time to load. The ‘latest posts’ page typically takes 5-10 minutes is there are lots of new pictures that my computer hasn’t cached.

I’m afraid Ken’s very nice rosette is taking a few minutes on its own – which is what has prompted me to post this!

When you insert an image into a post you can select ‘link to media file’ and choose a relatively small display size.

This means the post loads with a smaller version of the image, but if you want full resolution you can click on the smaller image to see it.

Once you have chosen a setting it stays as a default until you change it.

If you have 50MB/s broadband you are probably wondering what I am grumbling about, but believe me, with my 2.9MB/s it makes a big difference 🙂





Film , ” First Man “.

Stunning film on general release.

Includes a remarkable lunar landing , the approach will have you gripped. It deals with the conflict of inner space  and family against the urgent space race.

Next year will be 50 years since Apollo 11. How the mission was achieved with the technology available is just a miracle.

If you see one film this year , make it thus one !


Notes on DADOS Calibration Lamp from Baader Planetarium Website

The following explains why the light kept switching on and off when Lee and I changed the plug at RAG mid-monthly meeting last Friday!

It also explains the black ring under the lamp – this appears to be so that it can fit over 2 inch end of a spectrograph – will it do same on my CCDSPEC?



Notes on DADOS Calibration lamp

The Neon calibration lamp only shines in the dark due to a twilight switch. So incidence of extraneous light while taking spectra of this Neon lamp is avoided. Please fix the Neon lamp with its adapter directly at the 2 inch entrance of the DADOS spectrograph to focus DADOS and to take reference spectra. The brightness of this Neon lamp is adequate in this configuration.

However, the lamp is too faint to be used in front of a telescope. The visually perceived color “Neon red” is a quite unique color between dark-orange and light-red due to the spectral distribution of the emission lines.