Which of the folloving statements are wrong?

[hjernemadsen]

Advertisement (gone after registration)

In order to assure myself:

 

Which of the folloving statements (if any) are wrong?

 

1) If you use IR filters on a 28MM lens and a (colour) film Leica you will experience the cyan corners.

 

2) If you use IR filters on a 28MM lens and a BLACK AND WHITE film Leica you will NOT experience any apparant side effects

 

3) If you use IR filters on a 50MM lens and a (colour) film Leica you will experience approximate the SAME amount of cyan corners as compared to a 35 mm lens with IR filter on a M8

 

4) If you use IR filters on a 75MM lens and a (colour) film Leica you will NOT experience the cyan corners.

 

Sincerely

 

Peter

[Advertisement]

The Leica Q3 is available for pre-order at B&H Photo Video and Adorama

[carstenw]

2 may be wrong in some situations. Since the cyan colour is actually caused by some red being filtered out, in a red picture, you would get extra-dark corners, due to some missing red, for example.

 

I don't know if 4 is right. Sure, there is hardly anything happening with corners on a tele lens, wrt. IR, but expecting nothing at all may overstate it. I guess some testing would straighten it out. I would try it, but my 60mm filter is not here yet.