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Originally posted by Azzy ....
My main priority is , I will be using it to take shots of anything from insects to some random object around the house.
One of the main reasons I specified the el-nikkor 50:2.8 on bellows is that it meets your criteria
to get as much magnification with highest IQ possible while essentially all the individual lens solutions are limited to 1:2 or at best 1:1 magnifications "at the highest IQ possible."
Others have touted the Lester A Dine 1:1, saying you won't do better...and this may well be true up to 1:1 mag. I've never seen a head to head comparison with it and the el-nikkor, I do know that the el-nikkor is widely touted for IQ. Here is a test recently posted here by Nass:
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/164564-pentax-...ml#post1705105
As I said earlier, I doubt you'll get much higher IQ over a wide magnification range regardless of cost. See Yeatzee's macro work on the forum.
The main shortcoming with getting optimal out-of-the-box use of the bellows/enlarger lens is that the auto-flash system won't work & you'll have to use manual flash - which is also the case for many of the macro lenses posted in this thread.
This can be solved by a few simple DIY approaches.
If you really intend to do some publication quality macro work at magnifications above 1:1 you might as well buy focusing rails, external flash, etc now.
Otherwise, for superb macros intended for electronic display spend your money on a Pentax DA 55-300mm lens and Raynox DCR 150 close-up adapter. It'll do what you want over a huge, zoom-able magnification range & all your automatic functions will work - focus & flash in particular. Later on you can go crazy on more esoteric macro systems if you get bit by the macro bug.
Last edited by newarts; 11-09-2011 at 05:51 PM.