Originally posted by Lowell Goudge With respect to PF. that is one reason I stayed away from the Tammy 300/2.8. I tried one with the 1.7x AF TC and found the PF and CA was much worse than my old SMC 300F4.
Which one Lowell,60B or 360B?
Looked at 60B toltally agree,360B is different animal.
Have copies of "K"300/4,"M"*300/4,and "A"*300/4 have found PF and CA about
same as with 360B when using AF1.7x,best results have been with M*300/4 and AF1.7x
About same as 360B and AF1.7x. Tammy has the advantage in speed.
Alone,all 4 of those len's are extremely sharp,could throw 60B in too,havnt used one much.
Said I wouldnt upload swan pics anymore,is all I have handy.25% of sensor
resized to 801 by xxx pixels.No PP.Had contrast adjusted 75% beyond midpoint setting in body.
Does seem to minimize PF and CA.Also seems to make bird standout
from background.Something else is that having contrast bumped up does seem
to give more assertive AF lock on moving subject.(with AF1.7x)
Talked with pentax directly 2 weeks ago about ordering something that gives
me desired reach without a TC.Very competative with nikon and canon,images
every bit as well.Found out that 3rd parties are involved,adds 400 to 700 USD
in brokerage fees.Im not here to feed those people.Not something I would
even consider from ebay or something like that