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02-03-2012, 06:48 PM   #16
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QuoteOriginally posted by falconeye Quote
A slower lens isn't a crippled one.

IMHO, fast lenses like 300/2.8 or 600/4 are a thing of the past. Not because they are expensive (they are). But because modern bodies with their ISO capabilities and SR simply don't need it to a degree that the burden to carry and handle them is justified. Sport events from a predetermined position using a tripod may reain the only exception. But those arevTV events with good light, so ...

Assuming the lens is tack sharp fully open, I consider F5.6 (or F5.4 if an AF TC requires it) to be the new sweet spot.
There is also an effective gain because of the APS-C half frame format although it is really just a crop, if you are using a full frame piece of glass.
Likewise I do not dispute that high ISO options have brought us a long way from the day when we were trying to get a perfectly exposed full frame Kodachrome color slide. As an owner of some of the heaviest glass than Pentax ever made (6000g A*400/2.8 comes to mind), I am also very conscious of the logistics of attempting to use this burdonsomely heavy glass. that said, the long glass needs to be able to get still longer
with a converter. While I have argued that a converter only substitutes an opticial crop for a digital crop and provides little net benefit
and is likely to provide less so in the future as the megapixal war rushes forward, the optical cropping of a 1.4x seems worthwhile, if for no other reason than to discourage the AF system from getting distracted by things that you will crop out of the photo ultimately anyway.

02-03-2012, 06:56 PM   #17
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QuoteOriginally posted by jpzk Quote
I speculate that the 550mm/5.6 will not be here before 2013, according to some posts in those threads:

I too have been looking into Sigma ... very expensive for the 500/4.5 and into the extremely rare/expensive Pentax FA*250-600, so I am hoping that my speculating becomes reality before 2014.

Cheers.

JP
Well it's on the roadmap for this year..... the 550 ought to be around for Photokina.
02-03-2012, 07:00 PM   #18
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QuoteOriginally posted by jpzk Quote
Anyone dares guessing if this is going to be non-SDM; and what about the f5.4 ... what's that about if using a TC vs. the aperture difference of f0.2?

JP
It is just my speculation, don't read too much into it...

I said F5.4 because I know that this at 500mm works with an 1.4x TC (F7.6). And like in the post above, I think the new long tele should be fast enough to support AF with the TC.
02-03-2012, 07:02 PM   #19
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QuoteOriginally posted by rvannatta Quote
Well it's on the roadmap for this year..... the 550 ought to be around for Photokina.
Apart from speculating ...

We have been fooled once in the recent past regarding a roadmap from Pentax showing items "to be produced" but never appeared on the market.
Let's hope the Ricoh-Pentax venture will oblige this time !

Cheers.

JP

02-03-2012, 09:09 PM   #20
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Where are you finding said roadmap?

All i found was this article:
New Pentax DSLR lenses roadmap 2012-2013 | Photography News | What Digital Camera

it reads:
"At the launch of the Pentax K-01 there was a lens timeline outlining forthcoming Pentax K-mount lenses for the coming two years. The 2012-2013 range will include:
DA 50mm - no aperture information, due first quarter 2012
DA high magnification zoom lens - no exact information, appears at the 18-200mm point on the chart due first half of 2012
DA 500/600mm telephoto lens - appears at the 550mm point on the chart, expected to be 500 or 600m, due end of 2012
DA 10-30mm zoom - no aperture information, due beginning of 2013
DA 20-40mm zoom - no aperture information, due first quarter 2013
DA* zoom - no exact information, expected to be in the 18-200mm range, due first half of 2013
DA 100-300mm tele zoom - appears approximately at the 100-400mm point on the chart, presumption for a 100-300mm zoom, due last quarter of 2013
AF RC 1.4x teleconverter - due last quarter of 2013"


Where on the official pentax site is this listed? are there other roadmaps?

Last edited by cadmus; 02-03-2012 at 09:22 PM.
02-03-2012, 09:27 PM   #21
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Sigma 4.5 is not too big or too heavy, but is designed for full frame and has not been reduced in size to take advantage of APC cameras. I would assume that pentax will make a long lens that can be used on FF. If they don't it will indicate that FF is in the too hard basket.
02-03-2012, 10:10 PM   #22
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Finally a lens from Pentax I would consider... It might actually keep me in Pentax... F5.4/5.6... Hmmm would rather they just do it properly and just go with a 4.0/4.5... Better to have as fast as possible rather than to have to jack up the ISO, high ISO should be a benefit than a necessity... If that makes sense...

Keep it fast but use modern materials to keep weight down, that would be my suggestion...


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02-03-2012, 11:06 PM   #23
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QuoteOriginally posted by GordonZA Quote
Finally a lens from Pentax I would consider... It might actually keep me in Pentax... F5.4/5.6... Hmmm would rather they just do it properly and just go with a 4.0/4.5...
They would sell not more than a hundred in the world.

02-03-2012, 11:16 PM   #24
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It's a green dot and that means DA and not DA*
So it's a "budget" lens instead of a top lens so i'm more think about 550mm f/6.3 around the $1000 mark.
If it was a DA* they would have make it faster and much more expensive but since it isn't they will make it affordable.

A 550mm f/5.6 5.4 version will go around $2000 if not more and for that price why didn't they made it DA*?
02-03-2012, 11:27 PM   #25
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Could also be a mirror lens??

Fun to speculate...


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02-03-2012, 11:39 PM   #26
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Strange for me to say it, but it could be labeled DA not to reveal that is a DFA ready for full frame. Also, at the time of the 2007 roadmap, the 200 and 300mm lenses were labeled DFA without the * designation. And maybe they want to keep it "cheap" to sell to many, and if the user base of Pentax grows, then they will release a 500 or 600 F4, with DA* designation.

All in all, the roadmap seems just a little gift to Pentaxians, a reassertion that the the reflex line is not gonna die, but what is behind those green and orange line is not yet defined. Probably there are many lens project floating around in the Pentax offices, old ones, new ones, half baked ones, and they still have to choose what send to the production stage.
02-04-2012, 12:12 AM   #27
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QuoteOriginally posted by eurostar Quote
Strange for me to say it, but it could be labeled DA not to reveal that is a DFA ready for full frame. Also, at the time of the 2007 roadmap, the 200 and 300mm lenses were labeled DFA without the * designation. And maybe they want to keep it "cheap" to sell to many, and if the user base of Pentax grows, then they will release a 500 or 600 F4, with DA* designation.

All in all, the roadmap seems just a little gift to Pentaxians, a reassertion that the the reflex line is not gonna die, but what is behind those green and orange line is not yet defined. Probably there are many lens project floating around in the Pentax offices, old ones, new ones, half baked ones, and they still have to choose what send to the production stage.
Of course you're right. Many can't get it though.
02-04-2012, 12:49 AM   #28
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Well I'm already saving up for my new 500mm f5.6.

Seems the logical solution to me.

But then, I've been wrong on the odd occasion.
02-04-2012, 02:07 AM   #29
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I'm not a pro, so of course I would not be interested in a "Pro" lens, like for instance 600 / f4 weighing 5 kilos and 5 000 $.

As a non pro, I hope they will release a lens :

- hand heldable (at least for a few minutes), about 1,5 kilos or 2 maximum
- affordable (it depends on the budget of each Pentaxian), about 2 000 $ maximum
- image quality comparable to DA* 200 and DA* 300

I guess a 500 / f5.6 covering only the aps-c format (therefore smaller and lighter) might be compatible with these specifications...

I like a lot the 400 / 5.6 from Canon...
02-04-2012, 03:35 AM   #30
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I dont' think a 500/5,6 of the quality that Pentax can condor a minimum for a lens of this length could be just 2000. I guess less than 3000 a 500 or 560 prime can't be. The reason for the long tele zoom (170-400, I hope) should be to give us something long and affordable.
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