I noticed in your shot there seems to be elongation of the core in the E-W direction, at least assuming N is up. I took another run at Omega C last night, this time guided so my stars are round. I do not see the same oval shape of central condensation as you have - is this is real and I have lost the information by clipping or is there some distortion somewhere?
Tony have you decided to get the baader UHC-s Filter
Obviously not for cluster but for neb's and galaxy's...brilliant.
I'll be sure not to agree with you from now on lol.
I have been using the Baader UHC-s filter for a couple of months now. I didn't use it on the omega shot and I haven't tried it on a galaxy as yet. I used it on my LMC shot recently, taped to the front of a 135mm lens:
I noticed in your shot there seems to be elongation of the core in the E-W direction, at least assuming N is up. I took another run at Omega C last night, this time guided so my stars are round. I do not see the same oval shape of central condensation as you have - is this is real and I have lost the information by clipping or is there some distortion somewhere?
Hi John,
To be truthful, I can't see the difference that you suggest. I do note that your image is rotated 90 deg CCW compared to mine. I have looked at various transforms and can't really see a difference.
To be truthful, I can't see the difference that you suggest. I do note that your image is rotated 90 deg CCW compared to mine. I have looked at various transforms and can't really see a difference.
Cheers
You are correct a 90 deg rotation makes the images comparable, there must be a slight N-S bulge, if I get time I might try to measure this somehow.
