gmazza
5th of December 2009 (Sat), 14:06
Please, I don't want to start a cruzade, just pragmatic aproach to the idea.
Have serached about and find very little info about using 180mm macro lenses and diopters or inversed lens, at first the idea really have it's drawbacks:
1. Heavy weight
2. Could use dedicated lens for it (MP-E)
3. There are few diopters and lenses to reverse in the 72mm (filter size) range
But have also some good things, and I wonder why so few people tried it (or at least wrote about it)
1. Longer focal lenght make good use of diopters for easy great magnification.
2. most of these 180mm lenses have 72 mm aperture lenses the hole of a 72mm aperture at, would say, f/16 is bigger than one of 58 or 52mm size, so I expect less diffraction at highter apertures (this in theory I am right or wrong about the diffraction thing ?)
3. Fast and nice recovery of infinite focusing when needed (most places where I do my insect photos are not controled gardens, but wild, is usual to find monkeys, nice birds and other mamals nearby)
4. I'm used to, and like a lot internal focus lenses wich not change in size, personal preference.
Of course is possible to have a MP-E and a tele, but I surely will face sensor dust problems and lost timming for some shoots.
But above all, why so few people tried this ?
Have serached about and find very little info about using 180mm macro lenses and diopters or inversed lens, at first the idea really have it's drawbacks:
1. Heavy weight
2. Could use dedicated lens for it (MP-E)
3. There are few diopters and lenses to reverse in the 72mm (filter size) range
But have also some good things, and I wonder why so few people tried it (or at least wrote about it)
1. Longer focal lenght make good use of diopters for easy great magnification.
2. most of these 180mm lenses have 72 mm aperture lenses the hole of a 72mm aperture at, would say, f/16 is bigger than one of 58 or 52mm size, so I expect less diffraction at highter apertures (this in theory I am right or wrong about the diffraction thing ?)
3. Fast and nice recovery of infinite focusing when needed (most places where I do my insect photos are not controled gardens, but wild, is usual to find monkeys, nice birds and other mamals nearby)
4. I'm used to, and like a lot internal focus lenses wich not change in size, personal preference.
Of course is possible to have a MP-E and a tele, but I surely will face sensor dust problems and lost timming for some shoots.
But above all, why so few people tried this ?