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01-05-2014, 01:18 AM   #1
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Ideal lens for each body

OK, so, the time has come where I will have a body for each da* lens. My question for all of you spec-files is this? With a k7, k5, and k3 and a da* 16-50, 60-250, and 300, which lens would be best with each body. Its going to be a relief to have these focal ranges permanently attached to the bodies without having to change lenses. The only time it'll be necessary is if I want to use the sigma 50. Soooooo any ideas here?

01-05-2014, 01:45 AM - 1 Like   #2
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When I was in Afghanistan and did dual body work during patrols, I carried a K-7/K-30 on the DA* 16-50 and the K-5 on the DA* 60-250.

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The reason, especially when it was the K-7/K-5, was the higher ISO capability of the K-5 negated the difference between the aperture fastness of the lenses (f/2.8 and f/4 on those two), whereas if I stuck the K-7 to the 60-250, I would have been pushing it to ISO 1600+, which would not have been good from an IQ standpoint as the K-7 has incredible image quality at base ISO, however above ISO 800 it really starts to take a hit. And fast.

Since you have the K-3, though, I would do the DA* 60-250 or DA* 300 on that one since they will take advantage of the AF improvement (especially C-AF) the K-3 offers. On the K-5, I never found the AF of the 16-50 slow because it's a wide lens. That and I don't use it for any sort of action photography. It's my documentary/landscape lens, and for those purposes, it has never felt sluggish. In fact, sometimes I have to refocus it just to make sure it did move because I missed it

I don't have the DA* 300, but whenever I do dual carry, the DA* 60-250 is on the fastest focusing body (which also happens to have the same or better ISO capability as the other, so no net loss there).

Hope this helps

-Heie
01-05-2014, 01:59 AM   #3
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Depends what you're shooting of course
I've found little difference between K-5(IIs) and K-7 whilst shooting motor racing in decent light with a DA*300.

With flying birds or anything in poorer light had less (clean) success with K-7.

Do you really want to carry around 3 bodies with 3kg of lenses? Isn't 2 confusing enough?
01-05-2014, 04:32 AM   #4
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Heie, I like your approach. Something I'll really think about.

Steve, if I could havey cake and eat it too I would, but I think its more confusing to constantly change lenses when I could have 3 bodies. I don't shoot much action but having all three at my disposal would be a HUGE advantage.

01-07-2014, 06:40 AM   #5
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some interesting reading here:

Best lenses for the 24-MPix Pentax K-3: Recommended primes and zooms - DxOMark
01-09-2014, 12:50 AM   #6
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So, after further review, this is how its primarily going to go. Maybe someone else is interested.... I ordered the k3 silver edition w/grip tonight. Ill order the 16-50 in roughly a month or so.

K3 - 60-250mm
K5 - 16-50mm
K7 - lenses that are going to get switched around all the time (i.e. 1.8 50mm, 2.8 100mm macro, sigma 10-20)

When on an expedition/journey that requires the 300mm....

k3 - f4 300mm - the extra pixels will help with the longer focal length/crop factor
k5 - 60-250mm - if i need to pump up the iso up the noise performance will allow me to do this
k7 - 16-50mm - poor high iso performance is negated with short focal lengths.

Talk about Pentax porn.... I think I'm that guy now. Now if I could just get all of this stuff to pay for itself.....
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