Cheap Lens-coma!

[DaveS]

Took this photo of north Cygnus last night.

Canon 5D

Jupiter-9 85 f/2 wide open

16 subs, 1.6 sec

iso 1600

Stacked in DSS, resized in Picture Window pro 5

I hope you can see how horrible the coma is, if you can't I'll do a crop.

Dave

[SteveL]

Close the lens down a stop or two, that should reduce the issues

[Doc]

I had one of these lenses on my old Kiev Rangefinder many moons ago. They are good lenses but IMO not up to job as far as AP goes.

[DaveS]

Agreed.

I bought the thing on spec, it was only £40, so not a big hole in the bank-balance. The original plan was to use it for cine work if I bought a 5DII. That plan is on hold, and I've found the lens to be a bit soft, even stopped down for conventional photography.

My Leitz 180mm Apo gives geometrically perfect stars wide-open.

I was originally looking for a Leica 90 f/2, unfortunately by the time I had the funds, Ffordes had sold the last one they had. I'll have to wait and see if any more come in.

Meanwhile I may have some serious house-repair bills coming up, so non-essentials will have to go on hold

Dave