10-14-2010, 09:40 AM
(This post was last modified: 10-14-2010, 11:16 AM by Brightcolours.)
[quote name='wim' timestamp='1287014164' post='3624']
You know, I give up. It actually CAN result in veiling, but I am not going to get into a yes-no game here any further than this has gone already. If you honestly believe it doesn't, fine with me. I guess you also believe monocoated filters can't cause veiling and/or (extra) flaring. Same problem. I've seen the results personally, I've struggled to try and fix those results. Both cases. With and without.
I'm outta here.
Bye, Wim
[/quote]
I have never said that a back element can not cause anything. I said, the back element is NOT the cause for flaring and veiling from light sources that cause flaring and veiling. The back element only causes some problems with reflected back light from the sensor, which can cause some kinds of "purple" fringing and some light loss of contrast which is VERY low compared to the veiling we talk about here.
Why you want to drag in filters in this discussion, I do not know. What they can cause is totally different (they sit on the FRONT of a lens system, they are the ones that catch lights/side lights, and so on).
Anyway, the fact that Sigma uses a DIFFERENT coating in newer lenses on the back surface of the back element has nothing to do with what filters do/cause. And has also nothing to do with flares and veiling from back/side light sources.
You know, I give up. It actually CAN result in veiling, but I am not going to get into a yes-no game here any further than this has gone already. If you honestly believe it doesn't, fine with me. I guess you also believe monocoated filters can't cause veiling and/or (extra) flaring. Same problem. I've seen the results personally, I've struggled to try and fix those results. Both cases. With and without.
I'm outta here.
Bye, Wim
[/quote]
I have never said that a back element can not cause anything. I said, the back element is NOT the cause for flaring and veiling from light sources that cause flaring and veiling. The back element only causes some problems with reflected back light from the sensor, which can cause some kinds of "purple" fringing and some light loss of contrast which is VERY low compared to the veiling we talk about here.
Why you want to drag in filters in this discussion, I do not know. What they can cause is totally different (they sit on the FRONT of a lens system, they are the ones that catch lights/side lights, and so on).
Anyway, the fact that Sigma uses a DIFFERENT coating in newer lenses on the back surface of the back element has nothing to do with what filters do/cause. And has also nothing to do with flares and veiling from back/side light sources.