Originally posted by Wild Mark I didn't think to use the 1.7x adapter mainly because I have been dissatisfied with it (never seems to do well on combo's).
Well, a very quick test in dim light has me curious to test some more. I have combined the A*300/2.8 with 1.4XL and 1.7XF tc's. Image quality was surprisingly good. Also, light transmittance was good enough to allow for AF to function (perhaps this is related to the quality of the A*300mm lens (perhaps the T-stop of the A*300 is better than the average bear).
If the above combo works in broad daylight and the IQ is better than cropping then I have a semi-AF 714mm f5.6? - if so - AWESOME
I stack TCs on my DA*200, on my Tamron 2.8 it says right in the literature it doesn't work with stacked TCs, which I've confirmed. That in itself makes the A-300 attractive.
A stacked TC combo on DA*200 image.
DA*200 and stacked TCs (HD DA 1.4 TC and F 1.7x AF adapter.) slideshow.
People tell me stacked adapters are just wrong, but they won't say what's wrong with the pictures. It's one of those weird things.
Last edited by normhead; 08-08-2018 at 07:02 AM.