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08-31-2012, 07:56 AM   #16
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QuoteOriginally posted by RonHendriks1966 Quote
It never will be 400mm/f4! The frontlens is never big enough to catch the fotons. .

Wouldn't a 400/4 and a 560/5.6 have the same front lens diametre?

08-31-2012, 08:05 AM   #17
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QuoteOriginally posted by RonHendriks1966 Quote
It never will be 400mm/f4! The front lens is never big enough to catch the photons. But maybe it will be two lengths, but then 400mm/f5.6 or the longer one 800mm/f8.
400mm f/4 or 560mm f/5.6 require the same front lens, with a diameter greater than 100mm.
08-31-2012, 08:15 AM   #18
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QuoteOriginally posted by Adam Quote
I could be wrong, but I think the last (shortest) of the three lens photos was photoshopped by a member.
Yup, just some photoshop speculation on my part.
08-31-2012, 08:24 AM   #19
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I think it's going to collapse down to an 85mm f/0.85

08-31-2012, 08:26 AM   #20
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QuoteOriginally posted by seventhdr Quote
Well it could be collapsable or it could be a dual focal length lens. A 400mm f4 or a 560mm f5.6.

And what are the two switches on the side of the lens. It could be an SDM lens in which case one switch is the AF/MF switch but what could the other switch be for?

Regards

Chris
Perhaps to limit focus travel, like in a macro lens - just a guess. Maybe its to switch between SDM drive and DC drive
08-31-2012, 08:47 AM   #21
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QuoteOriginally posted by Pål Jensen Quote
A recently filed Pentax patent [...]
See comment on 2011-022280
08-31-2012, 11:56 AM   #22
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QuoteOriginally posted by Pål Jensen Quote
I doubt the mock-ups don't reflect the real thing. If so, they wouldn't have shown it...
The CP+ rep said that this was a very, very early mockup (there was no glass in it either), but I guess we'll have to wait and see!

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08-31-2012, 02:33 PM   #23
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QuoteOriginally posted by Pål Jensen Quote
Wouldn't a 400/4 and a 560/5.6 have the same front lens diametre?
Yes, probably

QuoteOriginally posted by Mistral75 Quote
400mm f/4 or 560mm f/5.6 require the same front lens, with a diameter greater than 100mm.
Yes probably.

But the tube gets thinner end thus giving less light.

QuoteOriginally posted by RXrenesis8 Quote
Okay, so just a photoshop thing, I missed that. But then it realley only is the hood going out.

08-31-2012, 07:32 PM - 1 Like   #24
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560mm at Photokina

Pentax DA 560mm f/5.6 lens to be announced at Photokina | Photo Rumors
08-31-2012, 11:13 PM   #25
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Thats good news, i hope it pans out.
09-01-2012, 11:16 AM   #26
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They probably read it here....
09-02-2012, 04:26 AM   #27
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QuoteOriginally posted by Pål Jensen Quote
They probably read it here....
They do read overhere and repost, since they did that last october with my post about my visit to the Salon the la Photo in Paris.
09-06-2012, 11:46 AM   #28
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QuoteOriginally posted by LamyTax Quote
Those mockups were not real. If so, Pentax could have released the lens by now .
Well, they had working prototypes of the DA* 1.4x TC and some members even used on at the show. However, it has never hit the market.
09-06-2012, 11:48 AM   #29
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QuoteOriginally posted by Pål Jensen Quote
A recently filed Pentax patent makes this highly likely and explains the photo below. The english is badly translated but the meaning is clear.

"Pentax applied for a patent about a division-type lens body tube. It is hard to carry the super tele-photo lens, but it will be easy to carry it if degradable.

. . .
Since Pentax now holds the Patent on the degradable lens, 1) does this mean companies with crap lenses have to pay royalties; and 2) does this patent retroactively cover the SDM.
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