New Member Registered: November, 2022 Location: Ceske Budejovice Posts: 24 | Review Date: November 24, 2022 | Not Recommended | Price: $640.00
| Rating: 4 |
Pros: | Sealing, build quality except front lens cap. | Cons: | Front lens cap continually falling from lens. | Sharpness: 4
Aberrations: 1
Bokeh: 8
Handling: 3
Focusing: 5
Camera Used: Pentax K1
Value: 3
| | General impression:
with K1 it has good handling balance, but in general its big and heavy lens.
Lens comes with very practical bag, bag is a bit solid it will make a good protection for lens.
Build quality very good, lens is robust, except front lens cap.
I have no idea how front cap could be so bad, its just don't holds on lens and in general it looks like it is from much cheaper lens. Other people also have problem with it, for now as I know it affects all lens copies.
I have to say, I was expecting a lot from this lens, its advertised as very good astro lens. In my opinion I got a bad copy, therefore I returned it, lens serial number is 09822070019. Never the less I will give it 2nd chance and will order new copy of lens and then will update the post. Cause I think I was simply unlucky.
Maybe with next copy of lens I will be able to recommend it but for now no.
Sharpness: 4 - my copy has an issue. I think good copy could be extremely sharp.
Aberrations: 3 - my copy was really bad.
Boken: nice, smooth.
Handling: 3 - Handling would be 8 if not that front cap. 10 not possible because of weight and size.
Focusing: 5 - very good for manual lens for day time, for astro it's a bit hard, maybe because of bad copy of lens. If not decentering issue would give 8.
Value: 3 - bad copy. In general I was thinking if I should post a review at all. But i think it important to let others now in advance that they could expect some issues.
I think good copy of this lens has protentional for overall 7+ rating. (I'm a bit tuff on quality...)
I made a test for aberrations, took 5 sec shots from f1.4 up to f2.8. Then normalized brightness for all shots in PP and used ASTAP to generate crops with corners to look close on aberrations. Coma and astigmatism are at all F-stops! I think its also has decentering issue, that why in some areas of images star are very sharp and in other not like they were out of focus. Also this lens suffers from chromatic aberration. Details in link below: https://flic.kr/s/aHBqjAgBWr
Example of photos I was able to get from this lens: https://flic.kr/s/aHBqjAgzHL
For that I used my Pentax K1, Astrotracer, Sequator for stacking and PP for editing, more details directly in name of photos.
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