Originally posted by Douglas_of_Sweden The FA77 is a nice lens...but it is after all just a slow budget AF version of the A*85/1.4 (now I will soon get bashed!), so why not go for the original...there is one on the forum market now.
I will not bash you since the FA77 is indeed an autofocus version of the A*85. They both have 7 elements in 6 groups arranged exactly the same way, with 9 bladed aperture and FREE (Fixed Rear Element Extension) focusing. Unlike the FA*85, they are both designed to put the subject in the middle of the zone of focus, so as to maintain ultimate sharpness.
However, I disagree with the word "budget" since most would find the FA77 fairly expensive in the Pentax range. And it is certainly no budget build but a most excellent all-metal construction with smooth manual focusing and aperture dial. If you mean it is "affordable" then I would agree.
In almost every way the Limited lens betters its predecessor. The FA77 is only 4.8cm long compared with 6.6cm, weighing a mere 270g versus 555g. This lens won't scare small children and there's no excuse not to have it in a handy bag or pocket. The A* with hood is not fitting in any pocket any time soon. Speaking of which, the snazzy built-in FA hood rocks!
The FA77 has better close focus, 70cm compared with 85cm. It takes less expensive 49mm filters, matching the rest of the range. And it comes in silver should you wish to match metal finish bodies.
In fact the only thing the A* has going for it is a faster aperture, but it's not even a full stop. At similar apertures the lenses test out to have similar sharpness, and both can suffer in the same way from CA.