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04-16-2008, 07:08 PM   #1
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Lenses with resolution to match K20D

.


The K20D's 14.6 MP resolution is often discounted - It seems like the general consensus is that
current sensor technology 'sweet-spot' is 10-12MP. I'm not so sure. After playing with my Viv
S1 105 macro for the past couple days on the K20D, I think the 14.6MP combined with excellent
high ISO performance brings new capabilities to high resolution macro lenses. Cropping will
now take on new importance - my ability to crop a shot taken with a high resolution lens
is nothing short of stunning.

I think the sensors coming out in the next few years will now start to do the great lenses justice -
starting with the Pentax K20D + Vivitar S1 105 in 2008.

Here's an untouched (no sharpening, no PP of any kind) jpeg straight from the camera, with crop below:

ISO 800 - Viv Series 1 105 macro:




crop:




Last edited by jsherman999; 04-17-2008 at 07:07 PM.
04-16-2008, 07:14 PM   #2
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I have to say, I totally agree with you...stunning!
04-16-2008, 07:17 PM   #3
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I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
04-16-2008, 07:23 PM   #4
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WOW! Amazing!

I need to get over my LBA (haha!) before I even seriously consider upgrading my body (no, not the one I live in, although I could stand a little upgrading in the way of some lipo here and there).

Seriously, I may wind up upgrading to the K20 when everybody else is busy upgrading to the K30.

Heather

04-16-2008, 08:04 PM   #5
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wowwwww!!! that shot at ISO 800 is stunning.
04-17-2008, 02:36 PM   #6
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that really is astonishing!
04-17-2008, 02:38 PM   #7
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That's just amazing!
04-17-2008, 02:52 PM   #8
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QuoteOriginally posted by Buddha Jones Quote
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
I don't need to buy a K20D
As I am so fond of saying..

What does need have to do with it?

04-17-2008, 03:54 PM   #9
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Uau !!!!!!
04-17-2008, 05:52 PM   #10
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Iso 1600!

.


Very overcast today, and I got out there later - much less light.

So here are ISO 1600 shots with the Vivitar S1 105 macro. There's some visible chroma noise in the crops
(crops are labeled below,) but uncropped? You be the judge.


All ISO1600 handheld jpegs:












Previous cropped:






Previous cropped:






Here's a link to some more ----> Vivitar S1 105 ISO 1600



.

Last edited by jsherman999; 04-17-2008 at 08:15 PM.
04-17-2008, 05:57 PM   #11
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QuoteOriginally posted by jsherman999 Quote
So here are ISO 1600 shots with the Vivitar S1 105 macro. There's some visible chroma noise in the crops
(crops are labeled below,) but uncropped? You be the judge.
wow ... just wow, that's ridiculous
megapixels definitely do matter, but the K20D has the clean output to back it up
04-17-2008, 06:31 PM   #12
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QuoteOriginally posted by k100d Quote
wow ... just wow, that's ridiculous
megapixels definitely do matter, but the K20D has the clean output to back it up

Yeah. The sensor just keeps up with the glass, that's what amazes me - the Viv S1 105 is arguably the best
macro you can buy for K mount (along with the VL 125, maybe Tamron 90, a few others) and the sensor
just says bring it on, I will resolve what you send me down the tube.

It's almost kinda humbling. I have an unworthy feeling right now. I was able to keep the shutter speed
high enough to counteract hand shake with a huge heavy lens because of the fact I could go to ISO 1600
with those results. Wow.

I also can't wait until I have more than a few minutes to spend, in some actual good light, and with a tripod -
I wonder what ISO 100 looks like with this combo?




.

Last edited by jsherman999; 04-17-2008 at 07:12 PM.
04-17-2008, 09:54 PM   #13
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Wow, thanks for the extreme crops of the rabbit pellets. I could have gone all day without seeing that.
04-17-2008, 09:59 PM   #14
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Hey, it's nature!

Those little hopping buggers are actually cramping my macro style right now -
the nice purple flowers I shot yesterday were all chewed down to the stems today.


.
04-18-2008, 02:12 PM   #15
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Iso 3200

.


Raining, so can't even get out to the yard today, but - Pushing the envelope a bit
further on the back deck... same combo @ ISO 3200 :




ISO 3200 K20D Vivitar S1 105 f/2.5 macro, all handheld jpegs, slight sharpening in picasa









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