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07-13-2012, 12:21 AM   #691
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Collapsed, it is perhaps a macro lens...

07-13-2012, 01:10 AM   #692
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QuoteOriginally posted by fs999 Quote
Collapsed, it is perhaps a macro lens...
Maybe even a fish-eye
07-13-2012, 01:48 PM   #693
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Found this picture.



07-14-2012, 05:35 AM   #694
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The first picture shows both lenses without lens hood attached/extended; in the second picture the lens hoods are in place. The speculation is really about the next section from the left and whether that collapses too. The knob on the left with the grooves underneath it suggests that this section is made to be turned by hand. I assume the knob on the right slackens the friction in the tripod mount to allow the lens to be rotated while mounted to a tripod. And the little knob on top on the far right - I have no idea what that might do.

07-14-2012, 06:11 AM   #695
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QuoteOriginally posted by Paul Ewins Quote
The first picture shows both lenses without lens hood attached/extended; in the second picture the lens hoods are in place. The speculation is really about the next section from the left and whether that collapses too. The knob on the left with the grooves underneath it suggests that this section is made to be turned by hand. I assume the knob on the right slackens the friction in the tripod mount to allow the lens to be rotated while mounted to a tripod. And the little knob on top on the far right - I have no idea what that might do.
just a WAG on my part but.

1) some lenses were made in 2 halves to make transporting easier, a short square case is easier than a really long narrow one,

but the next idea is more likely

2) really long tele lenses have problems with focus throw, and the changes needed to achieve minimum focus. recall the K1000/8 and 500/4.5 which had 100 and 50 foot minimum focusing respectively, or the pentax 130-640mm zoom that had a custom close up lens. Why not have a manually movable front group, to give really close focusing when needed but allowing fine control with shorter throw of the AF when not needed.
07-14-2012, 06:59 AM   #696
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QuoteOriginally posted by Paul Ewins Quote
(...)
And the little knob on top on the far right - I have no idea what that might do.
It is meant to release the filter holder. Lenses with a huge front element often have rear filters inside a filter holder.

See for instance the DA 645 25mm f/4:




Last edited by Mistral75; 07-14-2012 at 07:04 AM.
07-14-2012, 07:25 AM   #697
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QuoteOriginally posted by Lowell Goudge Quote
but the next idea is more likely

2) really long tele lenses have problems with focus throw, and the changes needed to achieve minimum focus. recall the K1000/8 and 500/4.5 which had 100 and 50 foot minimum focusing respectively, or the pentax 130-640mm zoom that had a custom close up lens. Why not have a manually movable front group, to give really close focusing when needed but allowing fine control with shorter throw of the AF when not needed.
I never thought of it before, but this possibility sounds likely to me. I have a Sears A 135mm 2.8 macro which allows you to rotate the front element inward, reducing the minimum focus distance to achieve 1:5 magnification.
07-25-2012, 11:29 AM   #698
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Did you all see this?

QuoteOriginally posted by tscip22 Quote
Last week Pentax did their road show in Minneapolis, primarily to speak of and demo the K30. They did have the 645 and a great set of 35 mm lenses to play with. When asked, the representative stated he has not heard of the 560 lens, and is certain it is not in the current roadmap.


07-25-2012, 12:15 PM   #699
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QuoteOriginally posted by crewl1 Quote
Did you all see this?
Maybe he hasn't looked at the road map lately.
07-25-2012, 12:41 PM   #700
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QuoteQuote:
When asked, the representative stated he has not heard of the 560 lens, and is certain it is not in the current roadmap.
Sigh. Plus ša change...
07-25-2012, 12:47 PM   #701
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QuoteOriginally posted by crewl1 Quote
Did you all see this?
Nope. That is truly awesome.


Sigh....
07-25-2012, 02:29 PM   #702
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Please send him a link to the roadmap...
07-25-2012, 02:32 PM   #703
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The representative needs a good > :dang:
07-25-2012, 10:41 PM   #704
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QuoteOriginally posted by french_mike Quote
i was talking about the smaller lens -> DA*50-135, someone said it was the DA*300

it's clearly the 50-135. you can see the two rings, and the zoom numbers. It's NOT a 60-250 because the 60-250 has space
for a removable tripod mount between the green stripe and the zoom ring. It can't be a fixed focal because it has a zoom ring.
07-26-2012, 12:33 AM   #705
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QuoteOriginally posted by ElJamoquio Quote
Nope. That is truly awesome.


Sigh....
The guy must be a bit on the slow end of things. Probably fell asleep during the Hoya time.
No worries, he's likely the least informed person working at Pentax.
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