High resolution widefield of Swan&Eagle

[avandonk]

I recently built a stepper focuser for lenses which gives me very accurate control over correct focus. By experiment I had also established the focus position variation with lens body temperature for the 300mm lens.. So last night armed with this information collected nine frames while monitoring the lens body temperature and adjusting the focus as needed. It worked extremely well. Bird would be proud as I was inspired by his experiments with mirror temperature monitoring.

Details
Canon 5DH, Canon 300mm F2.8L at F2.8, Hutech LPR filter, 9X8min at an ISO of 200, in camera noise reduction on. Processed with flats in ImagesPlus stacked with Registar and only adjusted levels in PS. Also a bit of R&L 5x5 for ten cycles.

Warning 3.1MB
http://members.optusnet.com.au/~cheekyfish/S&E_85.jpg

It may sound like it is going too far, but look at the results.

Bert

[Astroman (Andrew Wall)]

Awesome, just simply Awesome, the amount of objects in there is unbelievable. More we want more

[Dennis]

Terrific image Bert - really enjoyed reading about your home built focus stepper and your various experiments. It’s inspiring to see amateurs designing and building their own equipment in order to capture such wonderful images. Well done!

Cheers

Dennis

[Lester]

Hi Bert,

very nice image, with loads of detail.