Hi everyone,
yesterday i had some time and since the weather did not allowed something else i decided to make a small comparison between my lenses. Pentax DA40mm, Pentax FA 77, Pentax M 50mm 1.4, Sigma 105 Macro 2.8 (non DG version), Sigma 70-200 2.8 (non DG Version)
Pentax 40mm 2.8
Pentax 40mm 3.5
Pentax 40mm 5.6
Pentax M 50mm 1.4
Pentax M 50mm 2.8
Pentax M 50mm 5.6
Pentax 77mm 1.8
Pentax 77mm 2.8
Pentax 77mm 5.6
Sigma 105 2.8
Sigma 105 3.5
Sigma 105 5.6
Sigma 70-200 @ 200mm 2.8
Sigma 70-200 @ 200mm 3.5
Sigma 70-200 @ 200mm 5.6
So my thoughts for my little comparison...
I recently bought the FA 77mm 1.8 and i must say in the beginning i was not so thrilled with the results. To achieve the best results with this lens in matter of autofocus i needed to make some autofocus fine tune adjustments within the camera ( i own a K5). Later on the autofocus was good but i cant say this is my sharpest lens. My Sigma 105 is doing very well against the Pentax FA 77 - maybe even better. Well maybe i need to make some more pictures with the FA 77 to have a better picture.
The pentax DA 40mm, as one of my favorite lens in terms of portability didnt impress me with largest aperture settings. Maybe i ll sell it and get the 43mm.
The pentax m 50mm 1.4 did extraordinary well. As my oldest and cheapest lens in my collection it did achieve some spectacular results. Better than my 40mm, thats for sure. I dare to say maybe with 5.6 it achieves better results than my FA 77. Well maybe i have a bad copy
The Sigma 105 is also one gem. In the largest aperture it achieves already very good contrast and sharpness. So not afraid to use this wide open. Unfortunately two times wenn i tested it, with Aperture 5.6 it was not so sharp like 3.5 or 2.8. Maybe i need to check this again.
The Sigma 70-200 in the 200mm range did very good from 5.6. In 2.8 ofcourse it performed worse than all my lenses. But results were expected since it is a zoom lens.
When i did the test i tried always to have the same view from the nutella glass, so i moved back and forward with my tripod. The results are also not 100% precise because of the autofocus of my camera. Maybe next time i use manual focus
Anyway just thought to share this results with you! Any comments or critics are welcome
Cheerz,david