Photozone review of DA35mm/2.4 AL

ogl · 03-14-2011, 11:13 PM

Pentax SMC DA 35mm f/2.4 AL - Review / Lens Test

**robbiec** · 03-15-2011, 01:40 AM

One of our cheapest lenses gets a 3.5-4 rating optically

huupi · 03-15-2011, 02:04 AM

Nice ! We will see how long it last mechanically wise,other then that its optically the best you can buy if money is a limiting factor.
Its now clued to my K5 and am very happy with this combo.

**Rondec** · 03-15-2011, 04:15 AM

I would think it would hold up pretty decently. The lack of a metal mount would concern me more with longer lenses like the DA 55-300.

bdery · 03-15-2011, 05:00 AM

If I'm not mistaken, that's among the sharpest results for any Pentax lens they tested, ever. Is that still with the K10D body?

If so, then wow!

jane7l · 03-15-2011, 05:38 AM

Originally posted by bdery

If I'm not mistaken, that's among the sharpest results for any Pentax lens they tested, ever. Is that still with the K10D body?

If so, then wow!

you are mistaken. tested on k5.

paperbag846 · 03-15-2011, 08:05 AM

I would like for him to re-do the DA 40 on the k5 so we can get a clear picture of which lens is the better performer. The DAL 35 just looks amazing.

JHD · 03-15-2011, 08:49 AM

To be fair, all the lenses should be re-tested on a K5.

ogl · 03-15-2011, 09:20 AM

Originally posted by JHD

To be fair, all the lenses should be re-tested on a K5.

You can calculate the resolution of lenses at 16 MP if you know LW/PH at 10 MP. We know the resolution of Pentax lenses at 10 MP sensor.

And we know than K-5 has maximal LW/PH - 2750. K10D - 2350 LW/PH.

Pentaxor · 03-15-2011, 11:40 AM

Originally posted by ogl

You can calculate the resolution of lenses at 16 MP if you know LW/PH at 10 MP. We know the resolution of Pentax lenses at 10 MP sensor.

And we know than K-5 has maximal LW/PH - 2750. K10D - 2350 LW/PH.

that would mean, just add 400, right?

Pentaxor · 03-15-2011, 11:50 AM

anyway, if that were the case, in comparison to the FA35/2, the MTF results are pretty consistent regarding the FA35 being strong all over the frame. I think it's safe to say that the DA35/2.4 is a baby FA35. the reduction of resolution along the borders and corners would possibly been made to produce a smoother, less busier bokeh. although it still performed pretty good across the frame.

audiobomber · 03-15-2011, 12:07 PM

Optically the DA 35 is rated 3.5 stars vs the FA 35 @ 4 stars. That agrees with the photos and informal tests I've seen so far.

ogl · 03-15-2011, 09:13 PM

Originally posted by Pentaxor

that would mean, just add 400, right?

No. There is formula how to calculate. Falk Lumo knows. But he will be busy for the nearest 4 weeks.

bwDraco · 03-15-2011, 09:27 PM

Originally posted by ogl

No. There is formula how to calculate. Falk Lumo knows. But he will be busy for the nearest 4 weeks.

I don't think you need to wait for Falk Lumo (falconeye).

Multiply the lens' resolution as measured on the K10D by 2750/2350, or 1.17. The 1.17 factor is the ratio of the maximum resolution of the K-5 compared to that of the K10D.

Edit: This appears to be incorrect, as pointed out in later posts. Sorry!

--DragonLord

Class A · 03-15-2011, 09:58 PM

Unless Klaus publishes a conversion factor, there is no way of figuring it out for now. The figures are rather arbitrary (depend on AA filter strength and heavily depend on the amount of sharpening used) so results across cameras are not transferrable.

03-14-2011, 11:13 PM	#1
ogl Banned Join Date: Dec 2007 Location: Sankt Peterburg Photos: Gallery \| Albums Posts: 8,382	Photozone review of DA35mm/2.4 AL Pentax SMC DA 35mm f/2.4 AL - Review / Lens Test

03-15-2011, 09:27 PM	#14
bwDraco Veteran Member Join Date: Jul 2010 Location: New York Photos: Albums Posts: 1,071	Originally posted by ogl No. There is formula how to calculate. Falk Lumo knows. But he will be busy for the nearest 4 weeks. I don't think you need to wait for Falk Lumo (falconeye). Multiply the lens' resolution as measured on the K10D by 2750/2350, or 1.17. The 1.17 factor is the ratio of the maximum resolution of the K-5 compared to that of the K10D. Edit: This appears to be incorrect, as pointed out in later posts. Sorry! --DragonLord Last edited by bwDraco; 03-16-2011 at 05:28 AM.

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03-15-2011, 01:40 AM	#2
robbiec Site Supporter Join Date: Feb 2009 Location: Cork Photos: Albums Posts: 1,882	One of our cheapest lenses gets a 3.5-4 rating optically

03-15-2011, 02:04 AM	#3
huupi Inactive Account Join Date: Mar 2011 Location: brabant Posts: 2	Nice ! We will see how long it last mechanically wise,other then that its optically the best you can buy if money is a limiting factor. Its now clued to my K5 and am very happy with this combo.

03-15-2011, 04:15 AM	#4
Rondec Loyal Site Supporter Join Date: Mar 2009 Location: Gladys, Virginia Photos: Gallery Posts: 27,653	I would think it would hold up pretty decently. The lack of a metal mount would concern me more with longer lenses like the DA 55-300.

03-15-2011, 05:00 AM	#5
bdery Pentaxian Join Date: Mar 2008 Location: Quebec city, Canada Photos: Gallery Posts: 9,357	If I'm not mistaken, that's among the sharpest results for any Pentax lens they tested, ever. Is that still with the K10D body? If so, then wow!

03-15-2011, 05:38 AM	#6
jane7l Forum Member Join Date: Jun 2010 Location: slovenia Posts: 57	Originally posted by bdery If I'm not mistaken, that's among the sharpest results for any Pentax lens they tested, ever. Is that still with the K10D body? If so, then wow! you are mistaken. tested on k5.

03-15-2011, 08:05 AM	#7
paperbag846 Veteran Member Join Date: Jul 2010 Photos: Gallery Posts: 2,395	I would like for him to re-do the DA 40 on the k5 so we can get a clear picture of which lens is the better performer. The DAL 35 just looks amazing.

03-15-2011, 08:49 AM	#8
JHD Veteran Member Join Date: Jan 2010 Photos: Albums Posts: 1,406	To be fair, all the lenses should be re-tested on a K5.

03-15-2011, 09:20 AM	#9
ogl Banned Join Date: Dec 2007 Location: Sankt Peterburg Photos: Gallery \| Albums Posts: 8,382 Original Poster	Originally posted by JHD To be fair, all the lenses should be re-tested on a K5. You can calculate the resolution of lenses at 16 MP if you know LW/PH at 10 MP. We know the resolution of Pentax lenses at 10 MP sensor. And we know than K-5 has maximal LW/PH - 2750. K10D - 2350 LW/PH.

03-15-2011, 11:40 AM	#10
Pentaxor Veteran Member Join Date: May 2009 Location: Vancouver, B.C. Photos: Gallery Posts: 6,513	Originally posted by ogl You can calculate the resolution of lenses at 16 MP if you know LW/PH at 10 MP. We know the resolution of Pentax lenses at 10 MP sensor. And we know than K-5 has maximal LW/PH - 2750. K10D - 2350 LW/PH. that would mean, just add 400, right?

03-15-2011, 11:50 AM	#11
Pentaxor Veteran Member Join Date: May 2009 Location: Vancouver, B.C. Photos: Gallery Posts: 6,513	anyway, if that were the case, in comparison to the FA35/2, the MTF results are pretty consistent regarding the FA35 being strong all over the frame. I think it's safe to say that the DA35/2.4 is a baby FA35. the reduction of resolution along the borders and corners would possibly been made to produce a smoother, less busier bokeh. although it still performed pretty good across the frame.

03-15-2011, 12:07 PM	#12
audiobomber Veteran Member Join Date: May 2008 Location: Sudbury, Ontario Photos: Albums Posts: 6,806	Optically the DA 35 is rated 3.5 stars vs the FA 35 @ 4 stars. That agrees with the photos and informal tests I've seen so far.

03-15-2011, 09:13 PM	#13
ogl Banned Join Date: Dec 2007 Location: Sankt Peterburg Photos: Gallery \| Albums Posts: 8,382 Original Poster	Originally posted by Pentaxor that would mean, just add 400, right? No. There is formula how to calculate. Falk Lumo knows. But he will be busy for the nearest 4 weeks.

03-15-2011, 09:58 PM	#15
Class A Pentaxian Join Date: Aug 2008 Location: Wellington, New Zealand Posts: 11,251	Unless Klaus publishes a conversion factor, there is no way of figuring it out for now. The figures are rather arbitrary (depend on AA filter strength and heavily depend on the amount of sharpening used) so results across cameras are not transferrable.