<<DZ 40-150 0.16x MFD 0.9m 58mm thread
<<DZ 50-200 0.21x MFD 1.2m 67mm thread (Pentax T132)
<<PL 100-400 0.25x MFD 1.3m 72mm thread
<<http://fuzzcraft.com/achromats.html
<<For example, in 72mm the Minolta close up lens is priced around $400
<<https://www.ebay.com/itm/114237016097
<<T132, good luck finding one of these.
<<I bought the Sigma AML72-01 (72mm) and is too much diopter (+1.74) for my
case.
The max working distance isn't ideal for skittish critters but plenty good
enough for some macro. It was designed to be useful for 80-300 but as Moose
states,
doesn't perform optimally on the PL 100-400. I recently tried on the 12-100
again and need to process the images, but I think it might be OK.
These achromats need to go on dates with those zooms to see if compatible as it
is very difficult to predict how the optics will meld. The Pentax T132 is
married to the PL 100-400--'till death do they part. Moose has performed an
abundance of useful matchmaking (also known as MMM--matchmaker Moose).
One might try the Sigma on the DZ 50-200.
MIke
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