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03-26-2018, 02:20 PM   #1
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24-70 at 24?

Hello folks,
When I bought my K-1 in January, I bought the 24-70 to go with it. I didn't spend any time with it because I got caught up in having the FA Limited lenses. I returned it and got the Limited lens. Now, I'm thinking about getting it again. I've read all of the reviews, but really don't trust them. So, I want to know from forum members how this lens is at 24mm. If not so good at 24mm, at what focal length does the lens become excellent? I've been shopping for a lens wider than my 31, and was thinking about getting the zoom instead. I would really appreciate replies about your experience with this lens at the lower focal lengths. Thank you.
Terry

03-26-2018, 02:39 PM   #2
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At 24mm I think it's very good, maybe it's best (sharpest) FL. It gets less sharp towards 70mm.
03-26-2018, 03:06 PM   #3
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QuoteOriginally posted by ChatMechant Quote
At 24mm I think it's very good, maybe it's best (sharpest) FL. It gets less sharp towards 70mm.
Thank you, Chat. That's good to know. It's a shame that it gets less sharp at 70mm. I would think that 70mm is used quite often. So is it best used at 24mm-50mm? The reviews certainly don't mention that. I have made a lot of mistakes relying on reviews.
Terry
03-26-2018, 03:39 PM   #4
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QuoteOriginally posted by TerryL Quote
Thank you, Chat. That's good to know. It's a shame that it gets less sharp at 70mm. I would think that 70mm is used quite often. So is it best used at 24mm-50mm? The reviews certainly don't mention that. I have made a lot of mistakes relying on reviews.
Terry
I just bought one yesterday. Very sharp lens all the way.
Therefore you have to do the front and back focus test at 2:8. Mine needed +4.
Then you retest at 45mm f:4.5 8 11. Just to make sure the lens is sharp.
Bonne chance

03-26-2018, 03:59 PM   #5
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QuoteOriginally posted by TerryL Quote
Thank you, Chat. That's good to know. It's a shame that it gets less sharp at 70mm. I would think that 70mm is used quite often. So is it best used at 24mm-50mm? The reviews certainly don't mention that. I have made a lot of mistakes relying on reviews.
Terry
I mean wide open and relative to the fa ltds. Stop it down a little and it is plenty sharp through the range. Even wide open at 70 it is still good, but the 77ltd is sharper of course.
Here's a couple recent examples at 70 and 24 at 2.8:


03-26-2018, 04:12 PM   #6
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QuoteOriginally posted by TerryL Quote
It's a shame that it gets less sharp at 70mm.
Less sharp does not mean 'not sharp'.

Mine is excellent all the way through and I see no real difference at any particular focal length. But that might be how mine is AF tuned or some minor copy variation.

I have also at 24mm a Pentax-A 24mm f/2.8 and the Pentax-FA 20-35 f/4. The DFA 24-70 is clearly sharper than the Pentax-A 24mm @ f/2.8. I THINK the DFA 24-70 is sharper than the 20-35 @ f/4 but the difference if any is minor. And of course the 20-35 does not do f/2.8.

So stop reading reviews and just buy the darn thing.
03-26-2018, 04:23 PM   #7
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QuoteOriginally posted by jatrax Quote
Less sharp does not mean 'not sharp'.

Mine is excellent all the way through and I see no real difference at any particular focal length. But that might be how mine is AF tuned or some minor copy variation.

I have also at 24mm a Pentax-A 24mm f/2.8 and the Pentax-FA 20-35 f/4. The DFA 24-70 is clearly sharper than the Pentax-A 24mm @ f/2.8. I THINK the DFA 24-70 is sharper than the 20-35 @ f/4 but the difference if any is minor. And of course the 20-35 does not do f/2.8.

So stop reading reviews and just buy the darn thing.
That's excellent to know, matrix. There's some hope. It really is a convenient modern lens. Your experience with the lens does make me want to buy it. Thanks
Terry

---------- Post added 03-26-18 at 04:31 PM ----------

QuoteOriginally posted by ChatMechant Quote
I mean wide open and relative to the fa ltds. Stop it down a little and it is plenty sharp through the range. Even wide open at 70 it is still good, but the 77ltd is sharper of course.
Here's a couple recent examples at 70 and 24 at 2.8:


Nice pictures, Chat. Thanks for taking the time. I really didn't expect it to compete with my 31 and 77. But, it is a nice convenient modern zoom. Nice for vacation. I use the Limiteds when I have the time to think about what I'm doing. I really enjoy using them.
Terry
03-26-2018, 04:57 PM   #8
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Just another vote of experience saying I don't see how you could go wrong with this lens. I find it nicely sharp throughout the zoom and aperture ranges. It also does nicely with bokeh, has fast AF that works even in low light, and balances just right on the K-1. It won't really make you a better photographer, but you'll sure feel like one!

03-26-2018, 05:49 PM   #9
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24-70 is a fine lens!

When I bought mine I was disappointed, thought I had a bad copy. The photos were just not sharp. Then I bought a Spyder lenscal and checked all my lenses. The 24-70 wound up at +2 and is freaky sharp. I am a hardcore pixel peeper and am amazed at what this lens does. That lenscal tool is overpriced but I sprung for it when B&H had it on sale.
03-26-2018, 06:08 PM   #10
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QuoteOriginally posted by gerardbaron Quote
I just bought one yesterday. Very sharp lens all the way.
Therefore you have to do the front and back focus test at 2:8. Mine needed +4.
Then you retest at 45mm f:4.5 8 11. Just to make sure the lens is sharp.
Bonne chance
Thank you, Sir. It's good to know how to calibrate the lens.
Terry
03-26-2018, 06:18 PM   #11
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I have the DFA24-70 as well as the DFA15-30 and FA*24

I reckon the 24-70 @24 and f/2.8 is as sharp as either other lens. It shows the most barrel distortion of the three (the DFA15-30 has the least), but it's not a big issue unless you're shooting architecture. The FA*24 has the nicest rendering for environmental portraits. I'd have no hesitation in recommending the DFA24-70 as a general purpose event zoom.
03-26-2018, 07:42 PM - 1 Like   #12
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If you want wider, why not the 15-30?
03-27-2018, 03:24 AM   #13
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For landscape and architecture photography I use the D FA 15-30 and D FA 28-105. I decided on this arrangement because tests revealed that they are both sharper than the D FA 24-70, especially at edges.

I recently considered the D FA 24-70, so sought advice from users of both this and the D FA 28-105 on the pentaxusers.uk and they confirmed that although the D FA is (obviously) better for low light and oof separation, the D FA 28-105 is sharper at all lengths and across the frame. It's also a great walkabout zoom, being lighter and smaller. If you already have it, you'll need no advice from me, other than my suggestion, as above, that you consider that your next lens for that expanded width might well be the amazing D FA 15-30.

I do agree with your opening gambit being the three FA Limiteds, it would be nice if Pentax expanded that range with a 20mm or 24mm lens.
03-27-2018, 05:26 AM - 1 Like   #14
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QuoteOriginally posted by TerryL Quote
I've read all of the reviews, but really don't trust them
You can trust my review here It's only one sample, of course, but it was tested rigorously.
03-27-2018, 05:26 AM   #15
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QuoteOriginally posted by TerryL Quote
I've read all of the reviews, but really don't trust them
You can trust my review here It's only one sample, of course, but it was tested rigorously.
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