Hi, IT folks
I apologize for laying a question on the board so soon.
I was really hoping to contribute a bit more before asking anything, but here goes...
"Yes" I've already performed and read IT site searches for both step-up rings and adapters and not surprisingly didn't find this subject already addressed in the way I'm going about it.
I have a video camera with a 40.5mm front filter thread.
I would like to buy a wide angle/macro lens, and have two eBay choices:
Both are 0.45 wide angle lenses. Pretty much the same price for either. Off brand names.
Product A requires a step down ring to 37mm mount threads then to 46mm front filter threads.
(Logic suggests the glass is reasonably approximate to that 46mm diameter. I'm new to this, so I'm sensibly guessing).
Product B requires a step up ring to 52mm mount threads then to 67mm front filter threads.
Product A: VCamera @ 40.5mm - 37mm step down - 46mm front lens.
Product B: VCamera @ 40.5mm - 52mm step up - 67mm front lens.
Common sense/logic tells me Product A will create a (potentially) occluding ring in my image/FOV and Product B will reduce or eliminate such a problem.
Bigger glass means more room to not get in the way of itself.
Then I run across the following video and go "Yeah! Yeah! Yeah! THAT'S what I was worried about!"
http://www.youtube.com/watch?v=DFr8c7n_0To&feature=related
The fellow doesn't EXACTLY address the SPECIFIC concern I have in the way I've outlined, but he dances all around it and the problem he runs across (unforgivable blurring on the first lens aside) is EXACTLY what I'm concerned about.
I just didn't want to forget the guy's video as an example before I contributed more around here.
FWIW, I'll try to earn my keep.
Thank you very much.
Ray
I apologize for laying a question on the board so soon.
I was really hoping to contribute a bit more before asking anything, but here goes...
"Yes" I've already performed and read IT site searches for both step-up rings and adapters and not surprisingly didn't find this subject already addressed in the way I'm going about it.
I have a video camera with a 40.5mm front filter thread.
I would like to buy a wide angle/macro lens, and have two eBay choices:
Both are 0.45 wide angle lenses. Pretty much the same price for either. Off brand names.
Product A requires a step down ring to 37mm mount threads then to 46mm front filter threads.
(Logic suggests the glass is reasonably approximate to that 46mm diameter. I'm new to this, so I'm sensibly guessing).
Product B requires a step up ring to 52mm mount threads then to 67mm front filter threads.
Product A: VCamera @ 40.5mm - 37mm step down - 46mm front lens.
Product B: VCamera @ 40.5mm - 52mm step up - 67mm front lens.
Common sense/logic tells me Product A will create a (potentially) occluding ring in my image/FOV and Product B will reduce or eliminate such a problem.
Bigger glass means more room to not get in the way of itself.
Then I run across the following video and go "Yeah! Yeah! Yeah! THAT'S what I was worried about!"
http://www.youtube.com/watch?v=DFr8c7n_0To&feature=related
The fellow doesn't EXACTLY address the SPECIFIC concern I have in the way I've outlined, but he dances all around it and the problem he runs across (unforgivable blurring on the first lens aside) is EXACTLY what I'm concerned about.
I just didn't want to forget the guy's video as an example before I contributed more around here.
FWIW, I'll try to earn my keep.
Thank you very much.
Ray
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