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Old 15-12-2010, 02:16 PM
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dugnsuz (Doug)
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Join Date: Aug 2005
Location: Hahndorf, South Australia
Posts: 4,373
Quote:
Originally Posted by RB View Post
Much better Doug, that looks terrific.

Thanks Andrew

Quote:
Originally Posted by troypiggo View Post
Just re-read your first post above. Step rings to close down the aperture. Cool idea. Hadn't thought of that. Nice round aperture instead of diffraction spikes? Me go ebay now...

PS - I think your equivalent aperture would work out to around f/7.2. That's a good aperture in terms of sharpness and minimising CA for your lens.
Bert (avondonk) uses an aperture mask to stop down his 300mm f2.8 which gave me the idea to try step ring adapters.
Configuration for the 70-200mm f4L IS with its 67mm lens is...
67-72mm ring>>72mm IDAS LP filter>>72-52 ring>>52-37 ring

Quote:
Originally Posted by multiweb View Post
Maaaate! That's awesome! Well done indeed.
Merci buckets Marc

Quote:
Originally Posted by h0ughy View Post
I would be happy with that shot many times over!!
I was happy too Dave until I saw jase's LMC - WOW!!!

Quote:
Originally Posted by jjjnettie View Post
Pretty schmicko Doug!
Cheers jjj - hopefully weather will play ball and I can get some quality time under the stars.
It was a strange/wonderful feeling to be under a dark sky from horizon to horizon the other night. Steady!! I'm tearing up!!!

cheers all
Doug
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