Illah
TPF Noob!
- Joined
- Jun 29, 2006
- Messages
- 110
- Reaction score
- 0
- Location
- San Francisco
- Website
- www.grooveeffect.com
http://www.thkphoto.com/products/hoya/coatings.html
There's the hoya page that refers to a filter's reflectiveness and thus light transmission. Like you said, it's not like they block any appreciable amount of light, and even when the HMC reflects back 3% or so that's roughly 0.06 stops - more or less immeasurable. I think I read somewhere the standard one can refelct back up to 7% (doesn't say on the site), which is still only 0.14 stops, which may or may not be picked up by an in-camera lightmeter with a 1/3 stop (0.33) step-range.
So I would say that one is right to say *some* light is blocked/refelcted/whatever, but you are also right to say that it makes close to no difference in the real world.
--Illah
There's the hoya page that refers to a filter's reflectiveness and thus light transmission. Like you said, it's not like they block any appreciable amount of light, and even when the HMC reflects back 3% or so that's roughly 0.06 stops - more or less immeasurable. I think I read somewhere the standard one can refelct back up to 7% (doesn't say on the site), which is still only 0.14 stops, which may or may not be picked up by an in-camera lightmeter with a 1/3 stop (0.33) step-range.
So I would say that one is right to say *some* light is blocked/refelcted/whatever, but you are also right to say that it makes close to no difference in the real world.
--Illah