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10-05-2016, 03:57 PM   #16
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QuoteOriginally posted by Tjompen1968 Quote
Looking on the Tamron charts is not correct since the glass and coatings are Pentax, not Tamron.
Nope,the optical system is fully Tamron made.
The coating is also Tamron made.
Only the selection of the Pentax branded lenses is under Ricoh Pentax control.
Same game with the Pentax 2.8 24-70.
Better than the Tamron version with Nikon 810,cause of the Ricoh quality control.
Best regards

10-05-2016, 04:01 PM   #17
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QuoteOriginally posted by asahi man Quote
Nope,the optical system is fully Tamron made.
The coating is also Tamron made.
Only the selection of the Pentax branded lenses is under Ricoh Pentax control.
Same game with the Pentax 2.8 24-70.
Better than the Tamron version with Nikon 810,cause of the Ricoh quality control.
Best regards
So it isn't the HD coating even though it is branded as HD?
10-05-2016, 04:02 PM   #18
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QuoteOriginally posted by asahi man Quote
Nope,the optical system is fully Tamron made.
The coating is also Tamron made.
Only the selection of the Pentax branded lenses is under Ricoh Pentax control.
Same game with the Pentax 2.8 24-70.
Better than the Tamron version with Nikon 810,cause of the Ricoh quality control.
Best regards
Not what I have been told.
10-05-2016, 04:16 PM   #19
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QuoteOriginally posted by mikeSF Quote
Yeah, I find it a good zoom, but it just does not compare to my DA21, FA31 nor DA15.
From a technical perspective (sharpness, CA etc.) it should be significantly better than either of those.

10-05-2016, 05:12 PM - 1 Like   #20
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That 31mm ltd happily trashes the zoom @ 30mm right at f/2.8. 30mm is the worst setting of the zoom. Options have rolled in since 15-30 was the only modern choice. 15mm Irix and 20mm Samyang for example. They both take filters when needed instead of 1000$ filter setup for 15-30.
10-05-2016, 05:22 PM   #21
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QuoteOriginally posted by asahi man Quote
Better than the Tamron version with Nikon 810,cause of the Ricoh quality control.
Then Ricoh quality control is just as spotty as Tamrons, I have had 3 copies of this lens that have been less than perfectly centered.

I'm on my fourth copy, I typically just use the lens and visually inspect images of subject matter I know will reveal weaknesses - if I spot anything wrong, I put it on my optics bench.

Last edited by Digitalis; 10-05-2016 at 05:30 PM.
10-05-2016, 05:54 PM   #22
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Indeed, Digitalis hits the nail on the head. Nice to see other "picky" owners standing up for acceptable copies.
10-05-2016, 06:06 PM   #23
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QuoteOriginally posted by MJKoski Quote
Nice to see other "picky" owners standing up for acceptable copies.

Nothing about being picky. Lenses are costly and it's our right as consumers to exchange until we get one that performs to specs.

10-05-2016, 09:52 PM   #24
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QuoteOriginally posted by Tjompen1968 Quote
Not what I have been told.
Same here..From more then one.
10-06-2016, 03:00 AM - 1 Like   #25
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QuoteOriginally posted by FantasticMrFox Quote
From a technical perspective (sharpness, CA etc.) it should be significantly better than either of those.
It does have a lot less CA and fringing than the FA limiteds, but as far as sharpness goes, you have to stop down quite a bit to get into the same category as the FA 31.

That said, I do think with a good copy this is a very nice lens. I use the lens for landscapes (I haven't done any astro photography) and as such I am stopped down most of the time at least to f8. The biggest thing to me is the lack of distortion that you see at the wide end -- my experience with 15-ish mm lenses on full frame is that they are a mixed bag when it comes to distortion and that isn't always easy to fix.

I wouldn't hesitate at all to recommend this lens to a landscape or architecture/real estate photographer, but maybe hesitate if someone was interested in astro photography as their primary goal -- the Samyang 14mm or Irix 15mm might be better choices there.
10-06-2016, 03:07 AM   #26
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QuoteOriginally posted by yygomez Quote
Well I was expecting the same from the measurements, but is not what I see so far on the real life images, looks like the Tamron is way softer on the corners than the Nikon, even on the measurements:
The Nikon 14-24 suffers from very bad field curvature, so lab tests say nothing.The edges and corner can be very sharp but wont be at the same time as the center if you shoot a real subject.
That is a very well known issue.
10-06-2016, 04:24 AM   #27
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Field curvature with the Nikon changes with focusing distance and so it does with Zeiss 21mm. More nasty issue with the Nikkor is focus shift. Focusing to infinity with live view lens wide open will result in misfocused image @ f/4 or F/5.6 for example. This 15-30 has zero focus shift.
10-06-2016, 01:00 PM   #28
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Focus shift on the 14-24 is present, but greatly over stated as an issue, as least to me. I have used the 14-24 since early 2012 and still find it to be an excellent optic. Yes it's a bit dated, but still can perform very well on the D810.

The 15-30, another great lens, less flare issues than the 14-24, especially side flare where the 14-24 can ruin a shot. My 15-30, is very good from 15-24mm, after which it gets a bit less than perfect, but since I wanted it mainly for the 15-24mm range I kept it.

Both 14-24 and 15-30 are big heavy optics, not filter friendly, but they work. The Nisi filter holder is what I am using on the 15-30.

Personally, I find that the 15-30 is better than my 14-24 wide open, and by F3.5 is excellent where as the 14-24 needs to be at around F6.3 to F8. Focus Peaking on the K1 makes the manual focusing so much easier.

Paul C
10-06-2016, 01:15 PM   #29
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QuoteOriginally posted by kenspo Quote
Same here..From more then one.
Hmmmm... That's too bad, Pentax coating is one of the best.
10-06-2016, 01:28 PM   #30
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QuoteOriginally posted by blan01 Quote
Hmmmm... That's too bad, Pentax coating is one of the best.
What I mean with my statement is that it is Pentax HD coating, nothing else. Kenspo agrees.
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