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12-19-2013, 08:23 PM   #1
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Focal length vs Mpx: K-5IIs + DA21 or K-3 + DA15 and crop?

I just bought a DA15 while looking for the DA21 because a good opportunity showed up. I am also upgrading my K-5 to a K-5IIs (arround U$700).
Now, while still looking for a DA21 (arround U$400) it ocurred to me that combining the cost of body+DA21 I could buy a K-3 (U$1100 at amazon) and use it with the DA15 I already got. Id still get arround 16Mpx after cropping the DA15, 24Mpx image to match the DA21 field of view. Only loss I can think of is the size/weight advantage of the DA21. Same thing with K-5IIs vs K-3.

What do you think?


Last edited by carrrlangas; 12-19-2013 at 08:57 PM.
12-19-2013, 08:53 PM   #2
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QuoteOriginally posted by carrrlangas Quote
I just bought a DA15 while looking for the DA21 because a good opportunity showed up. I am also upgrading my K-5 to a K-5IIs (arround U$700).
Now, while still looking for a DA21 (arround U$400) it ocurred to me that combining the cost of body+DA21 I could buy a K-3 (U$1100 at amazon) and use it with the DA15 I already got. Id still get arround 16Mpx after crop. Only loss I can think of is the size/weight advantage of the DA21. Same thing with K-5IIs vs K-3.

What do you think?
I have the 15 Ltd and the 35 Ltd. Both lens are compact and light. I understand that the 21 Ltd is between my 15 and 35 in size and weight. If true, the weight difference would be like the difference between a bunch of six grapes and a bunch of eight grapes. You will find the sharpness of the 15 Ltd amazing. Perhaps the 21 will become the girl in the subway window seen from the station--lovely but now gone from memory.

The 15 Ltd haunts my mind with what it can do.
12-19-2013, 09:16 PM   #3
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i'm having trouble thinking of a situation where a you would need a 21 but couldn't make it work with the 15. or where you would so desperately need that 6mm of focal length that you'd crop and reduce image size instead of just zooming with your feet to the desired composition and keeping the full quality img from a k-3.

so i guess make mine a vote for the k-3 +15mm ( this is coming from a 21mm owner).
12-19-2013, 09:31 PM   #4
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I like the 21 for shooting indoors. 15 has much more wide angle distortion so if you intend to crop to emulate 21mm, you must be careful of your PoV or you'll have bulging bits and pieces all over.

12-20-2013, 02:32 AM   #5
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QuoteOriginally posted by waterfall Quote
Perhaps the 21 will become the girl in the subway window seen from the station--lovely but now gone from memory.
Outstanding metaphor. I will file that one away for future use.

-Heie
12-20-2013, 06:23 AM   #6
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QuoteOriginally posted by Heie Quote
Outstanding metaphor. I will file that one away for future use.

-Heie
Dang it. I was gonna claim that one second hand. You Army guys are always up too early. You're slow compared to the Air Force guys, but you always get there early.

Bill
12-20-2013, 06:33 AM   #7
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QuoteOriginally posted by Snydly Quote
Dang it. I was gonna claim that one second hand. You Army guys are always up too early. You're slow compared to the Air Force guys, but you always get there early.

Bill
Being 6 hours ahead of you in Germany also gives a considerable edge

But yes, the Army seems to prefer the latter of the two: "Work smarter, not harder."

-Heie
12-20-2013, 07:34 AM   #8
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QuoteOriginally posted by Heie Quote
Being 6 hours ahead of you in Germany also gives a considerable edge

But yes, the Army seems to prefer the latter of the two: "Work smarter, not harder."

-Heie
I had a temp stay at Fort Rucker BOQ. I was awakened every morning at 5:00am by the resident soldiers workout. I know they knew where the Air Force guys were. We worked hard in the Air Force too, just not that early...

Bill

12-20-2013, 07:45 AM   #9
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QuoteOriginally posted by Snydly Quote
I was awakened every morning at 5:00am
Never been to Rucker myself, but I'm sure they ran by just to be pricks

But at least it's not like the local nationals here. Everytime I speak with the locals that live just outside the base, they all (laughingly) curse the Americans for 'that damn loudspeaker every morning at 0630!" Because the base is right in town, everyone hears Reveille

-Heie
12-20-2013, 10:56 AM   #10
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Thanks for the advice everybody. It seems that the consensus is to stick to the DA15 regardless of getting the K-3 or K.5IIs. Thing is I am a sucker for small lenses (system actually) if I hadnt got so used to the layout (and top LCD) of the K-5 series Id happily use a K-r or K-x for when light gear is priority one. Also, the DA40XS, F28 and DA70 kind of spoiled me for small sharp lenses. I am travelling to New York for the holidays so I think I must take advantage of the country with the best prices on Pentax gear (regardless of MAP or whatever but thats another topic).
From your advice, I realize perhaps I should go for the DA35 Ltd instead of the 21 (would even be useful for my artwork photograhpy) but 35/2.8 is not an atractive FL/max aperture combination to me. Maybe Ill regret it later next year...

About 15 vs 21: The best comparison between the 15 vs 21 field of view and application I can think of is when I used my A24 and F28 on film. I remember I enjoyed taking portraits with the 28 but never managed to do the same with the 24, very difficult to get a flattering perspective for the subject while keeping the walls from falling

For crhistmas and New Years eve I plan to mount the 15mm, prefocus at 2m, @f/4 which should give me a DoF of about 7 meters, from 1,2m to 8m. How cool is that!? If instead I prefocus at 3m, @f/4 Ill get focus from 1,5m to 44m.. and hiperfocal distance when prefocusing at 4m, down from 1,8m... I must memorize this numbers and make visible marks on the barrel for 2, 3 and 4 meters

The 21mm works similarly, but add 2 meters to all the prefocusing and minimum focus distances...

EDIT: I remembered about these portraits taken with the F28 on HP5 Plus 400 ISO pushed 2 stops (sorry for the crappy scans!)
Attached Images
     

Last edited by carrrlangas; 12-20-2013 at 11:07 AM. Reason: grrrrammar
12-20-2013, 11:37 AM   #11
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QuoteOriginally posted by Bonobo Quote
i'm having trouble thinking of a situation where a you would need a 21 but couldn't make it work with the 15. or where you would so desperately need that 6mm of focal length that you'd crop and reduce image size instead of just zooming with your feet to the desired composition and keeping the full quality img from a k-3.

so i guess make mine a vote for the k-3 +15mm ( this is coming from a 21mm owner).
There is a huge difference between 21mm and 15mm in terms of FOV. As a result, moving closer to the subject (zooming with your feet) may not be an option for many subjects. There is also the fact that perspective is determined by the lens position relative to the subject and as such, zooming with one's feet is never fully equivalent to actually using the longer focal length. Cropping, on the other hand, always retains the desired perspective, though with some loss of quality.


Steve

(...big fan of primes, but truth is truth and zooming with one's feet is not quite there...)
12-20-2013, 03:37 PM   #12
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Personally, I wouldn't want to have to use the 15mm when I want 21mm. Just a convenience thing, really.
12-20-2013, 08:31 PM   #13
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You already have the 16-50, which can really serve as your 21. Sounds like you want the K-3, so go that way. You will get the 21 next year.
12-21-2013, 04:46 AM   #14
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QuoteOriginally posted by Kozlok Quote
You already have the 16-50, which can really serve as your 21. Sounds like you want the K-3, so go that way. You will get the 21 next year.
True, but due to size and weight I only use the 16-50 in studio or when in bad terrain and/or weather conditions. Else I prefer the primes! The K-3 will be cheaper next year, the DA21 probably not.
12-22-2013, 02:00 PM   #15
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Get the 21, it's a lovely lens in so many ways, and using stitching you can get a 15ish look very easily. You can benefit from end of line savings on an smc version of the 21, and the k3 will be 300 dollars cheaper next Christmas. And the firmware will be more refined.

In my opinion, k5 to k5iis is an unnecessary upgrade, the only reason to buy the iis is to possess both.
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