Lars
Active member
90 should be no problem. Only extreme shifts are usually a problem, and then only with very short focal lengths. I think even a 65 is workable on the Chamonix, though it might make the bellows crumble a bit temporarily. I've used 47XL on my Ebony with full rise, a 75-90 should not be a problem on most folders.
If you want to use your longer lens for 1:1 macros then 180-210 is more appropriate. A 240 is likely much heavier in a Copal 3, an 480 mm extension will be a bit shaky so you'll need a second tripod to get everything to calm down. With a 180 OTOH you get 360 mm at 1:1 which is more moderate.
Then again, if you look at dedicated macro lenses for 4x5, they are usually 120 mm or so, to give a moderate extension at 1:1. There is no real need for long focal lengths for macro. Keep in mind that at 1:1 the image circle doubles, so a 4x5 lens will cover 8x10 at 1:1.
If you want to use your longer lens for 1:1 macros then 180-210 is more appropriate. A 240 is likely much heavier in a Copal 3, an 480 mm extension will be a bit shaky so you'll need a second tripod to get everything to calm down. With a 180 OTOH you get 360 mm at 1:1 which is more moderate.
Then again, if you look at dedicated macro lenses for 4x5, they are usually 120 mm or so, to give a moderate extension at 1:1. There is no real need for long focal lengths for macro. Keep in mind that at 1:1 the image circle doubles, so a 4x5 lens will cover 8x10 at 1:1.