Pentax A 50mm f/1.7 + Pentax F-1.7x AF TC

After Pentax M 50mm f/1.7, I have been trying to get a good copy of Pentax A 50mm f/1.7. For one, my Kenko 2x Macro Teleconverter does not work well with M lens as it meters wide open aperture. I got my A 50mm f/1.7 along with a broken body in Pentax Program Plus.

Pentax A 50 f/1.7 lensThe Program Plus camera body seems to be mint cosmetic condition but it misses the focusing screen. And I tested the A 50 f/1.7 one evening in dining out in Niko Sushi. The size of A 50 mm f/1.7 is very similar to the M 50mm f/1.7 but they look cosmetically very different.

Test Shots:

Pentax A 50 f/1.7 lens

Pentax A 50 f/1.7 lens Test Shot with Pentax K10D

Pentax A 50 f/1.7 lens Test Shot with Pentax K10D
Pentax A 50 f/1.7 lens

Impressions & Notes
  • The magical TC turns my A 50 f/1.7 into a partial AF 85mm f/2.8.
  • Bokeh is not bad at all
  • 85mm is too long a focal length for food shot but the A 50 mm f/1.7 does very well for indoor. Pictures are sharp even when the TC is added and color and contrast are still good in the combination. I expect better color contrast and CA when the Pentax F-1.7x TC is not used
  • The combo works out quite well for me with partial AF, I call it my FA 85mm f/2.8
  • Many others have noted the better sharpness in 50mm f/1.7 as compared to f/1.4, I tested all test photos in f/2.8 and sharpness are quite good even in indoor setting.



Giuliano Pisoni said...

You must try the F 50 1.7. Imagine your A with full autofocus :-).
I have both, but the A is fused with my Kenko MC7 Macro :-D

AmyNaab said...

Hi, I know this is an old post, but I am curious where you found the A 50mm and how much it cost.

Unknown said...

Hi, how does the A50/1.7 compare with the M50/1.7 in terms of color rendition. I guess what I'm trying to ask, is there any difference that you can discern in term of the SMC formulation, or are the two optically identical.

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