Wide Angle Bellows for Linhof Schneider 90mm Angulon f/6.8?

[Kleiny41]

Greetings,

I have a Sinar F 4x5 and not long ago I purchased a Linhof Schneider 90mm Angulon f/6.8 lens. I don't have a strong sense of how one determines whether or not wide angle bellows are necessary. Can anyone enlighten me?

Many thanks!

Amanda K
DC

[Dan Fromm]

1: https://www.schneideroptics.com/info/vintage_lens_data/large_format_lenses/angulon/data/6,8-90mm.html Flange Focal Distance 90mm

2: https://www.bhphotovideo.com/c/product/800846274-USE/Sinar_F_4x5_Large_Format.html Minimum Extension 83mm (3.6") with standard bellows, 60mm (2.2") with wide-angle bellows, 30mm (1.2")with wide angle bellows and recessed lensboard #241052

3: do the arithmetic, think things over.