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03-21-2012, 12:06 PM   #136
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QuoteOriginally posted by gazonk Quote
Hmm, I actually think most quality Pentax lenses peak at f/5.6.

I quickly glanced through photozone.de tests of my most used lenses:

DA35 Ltd: Best at 5.6
DA70 Ltd: Best at 4-5.6
DA16-45: Best at 5.6, but very close to that at 4
DA55-300: Best at 8

(In addition, the FA31 and the DA35/2.5 peak at 4)
then we should be good for 50MP minimum before it's a major issue (for people using low end lenses they won't notice the difference anyway )

03-21-2012, 12:20 PM - 1 Like   #137
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I'd like mine in black, black, black, black, black, black and with a black battery door. Thanks.
03-21-2012, 12:21 PM   #138
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QuoteOriginally posted by bobell69 Quote
I'd like mine in black, black, black, black, black, black and with a black battery door. Thanks.
+1

With a blacklight top LCD backlight? Wow, that would be cool.
03-21-2012, 05:06 PM   #139
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QuoteOriginally posted by JanG Quote
Just a remark concerning the name: If the name should be K-z the cam surely has to be renamed for the German speaking markets and Israel as KZ is the all too well known modern abbreviation for the German word Konzentrationslager (concentration camp). The Nazis themselves used the more stringent abbreviation KL. And would anybody from the USA or where ever visit Israel with the letters KZ or KL on the cam? (Better you don't.) - I very much hope for Pentax that the cam is not called K-z!
Just another remark on top of yours, Jan:

I have a Zeiss T*planar 85/4 ZK (bold/underline added)
and it is therefore possible that they have also thought of making sure the lens would not be a "KZ" lens !

Cheers.

03-21-2012, 05:12 PM   #140
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QuoteOriginally posted by falconeye Quote
Did I mention that the viral marketing campaigns by Pentax start to become annoying?
Better its annoying than nonexistent. If more colors leads to more sales then I am all for it. Sheeze, some of you all make me laugh. Pentax can't ever win with you guys. If they don't advertize you gripe. If they do advertize you gripe. If they only offer 3 colors people always seem to want more but if they do oh it's just too tacky of them. Me, I'm just happy to see an ad or two for Pentax no matter how many freakin colors they make. Viral marketing, multiple colors=bigger sales guys, THINK ABOUT IT.
03-21-2012, 06:06 PM   #141
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QuoteOriginally posted by magkelly Quote
Better its annoying than nonexistent. If more colors leads to more sales then I am all for it. Sheeze, some of you all make me laugh. Pentax can't ever win with you guys. If they don't advertize you gripe. If they do advertize you gripe. If they only offer 3 colors people always seem to want more but if they do oh it's just too tacky of them. Me, I'm just happy to see an ad or two for Pentax no matter how many freakin colors they make. Viral marketing, multiple colors=bigger sales guys, THINK ABOUT IT.
K-01=bigger sales guys, THINK ABOUT IT.
03-21-2012, 06:32 PM   #142
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K-S is next letter after K-R
03-21-2012, 07:14 PM   #143
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QuoteOriginally posted by RXrenesis8 Quote
16....3.....12
11....6.....25
8.....12....50
This table oversimplifies a bit.

The easiest rule of thumb is that the resolution limit is at N/3 micron pixel sizes where N is the F-stop. So, for a 5 micron pixel sensor (K-5, D800), the limit would be hit at F/15. I.e., you need a diffraction limited lens at F/15 or better. This is quite a bit more optimistic than the table above.

However, you see a significant impact up to N/1.5 micron pixel sizes. Where micro contrast is weakened (by 50% or more) but not destroyed. That's a region to be avoided but not the limit. For 5 micron pixels, it means to better stay below F/8.

The very best SLR lenses peak at F/2.8 in the center, but F/4 is considered excellent too. Many lenses peak at F/8 in the corners though. The lesser lenses peak at F/8 even in the center.


But this entire discussion is meaningless. APSC SLRs have other problems which will prevent to exploit the full lens resolutions. Like defocus blur and shake. E.g., consider the 1/f shutter rule, meaning that a 50mm lens causes 30 microns blur (the coc) at 1/50s. So, if you want to eliminate shake with 3 microns pixels, you need 1/500s shutter speeds. Of course, an SR helps, but will it freeze your subject? So, what you need then is more light. APSC has resolution limits which aren't defined by the lens.


Last edited by falconeye; 03-21-2012 at 07:24 PM.
03-21-2012, 08:44 PM   #144
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Top Secret Pentax pic's.

I have come across photographs of the new top secret Pentax production facility. Notice the multiple product lines in all their colourful glory.



Last edited by bossa; 03-21-2012 at 09:04 PM.
03-21-2012, 09:31 PM   #145
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QuoteOriginally posted by bobmaxja Quote
K-S is next letter after K-R
Yeah, but they've been very random: K-m, K-x, K-r, K-....

Anyway, I couldn't care less for the name. They almost always came with a surprise. When everyone was expecting the MZ-D, they came with the *ist D. After the K10D, then the K20D, the obvious was to expect a K30D, but, voilà!, they remove de "D" and add a single number. Resuming the later flagship models, we got 2 similar names (K10D, K20D). Then 2 more similar names (K7, K5, now lowering numbers). So, I doubt the next flagship will be a K-3. If I'm wrong, I'll buy you a round of beers
03-21-2012, 10:30 PM   #146
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K-r came after K-x, so, would we expect a "regressive" letter?
xwvutsr
with that logic, it might be K-l?
I don't think so
03-21-2012, 11:14 PM   #147
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QuoteOriginally posted by monochrome Quote
K-01=bigger sales guys, THINK ABOUT IT.
Uh, I don't know. As much as I hope it sells for Pentax's sake I'm really trying hard NOT to think about that ugly thing.....
03-21-2012, 11:15 PM   #148
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QuoteOriginally posted by bossa Quote
I have come across photographs of the new top secret Pentax production facility. Notice the multiple product lines in all their colourful glory.


Oh my gosh is that a Barney keychain? How droll....
03-22-2012, 01:08 AM   #149
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QuoteOriginally posted by magkelly Quote
Oh my gosh is that a Barney keychain? How droll....
It's the new Pentax "disguised by" line of products that look like anything you want and come in every colour of the rainbow.
03-22-2012, 05:52 PM   #150
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I'm still waiting on the K300D
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