Pentax 560mm ?

**fs999** · 07-13-2012, 12:21 AM

Collapsed, it is perhaps a macro lens...

RonHendriks1966 · 07-13-2012, 01:10 AM

Originally posted by fs999

Collapsed, it is perhaps a macro lens...

Maybe even a fish-eye

coreyhkh · 07-13-2012, 01:48 PM

Found this picture.

Paul Ewins · 07-14-2012, 05:35 AM

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.

**Lowell Goudge** · 07-14-2012, 06:11 AM

Originally posted by Paul Ewins

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.

Mistral75 · 07-14-2012, 06:59 AM

Originally posted by Paul Ewins

(...)
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:

audiobomber · 07-14-2012, 07:25 AM

Originally posted by Lowell Goudge

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.

**crewl1** · 07-25-2012, 11:29 AM

Did you all see this?

Originally posted by tscip22

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.

Tom S. · 07-25-2012, 12:15 PM

Originally posted by crewl1

Did you all see this?

Maybe he hasn't looked at the road map lately.

Quicksand · 07-25-2012, 12:41 PM

Quote:

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 ça change...

ElJamoquio · 07-25-2012, 12:47 PM

Originally posted by crewl1

Did you all see this?

Nope. That is truly awesome.

Sigh....

Kunzite · 07-25-2012, 02:29 PM

Please send him a link to the roadmap...

Blue · 07-25-2012, 02:32 PM

The representative needs a good >

rvannatta · 07-25-2012, 10:41 PM

Originally posted by french_mike

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.

LamyTax · 07-26-2012, 12:33 AM

Originally posted by ElJamoquio

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.

07-14-2012, 06:59 AM	#696
Mistral75 Pentaxian Join Date: Feb 2009 Location: Paris, France Posts: 7,527	Originally posted by Paul Ewins (...) 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.

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07-13-2012, 12:21 AM	#691
fs999 Loyal Site Supporter Join Date: Jul 2008 Location: Luxembourg Photos: Gallery Posts: 8,639	Collapsed, it is perhaps a macro lens...

07-13-2012, 01:10 AM	#692
RonHendriks1966 Banned Join Date: Jan 2009 Photos: Gallery Posts: 9,675	Originally posted by fs999 Collapsed, it is perhaps a macro lens... Maybe even a fish-eye

07-13-2012, 01:48 PM	#693
coreyhkh Senior Member Join Date: Mar 2012 Location: London Ontario Posts: 131	Found this picture.

07-14-2012, 05:35 AM	#694
Paul Ewins Senior Member Join Date: Sep 2009 Location: Melbourne, Australia Photos: Albums Posts: 274	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
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,888	Originally posted by Paul Ewins 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, 07:25 AM	#697
audiobomber Veteran Member Join Date: May 2008 Location: Sudbury, Ontario Photos: Albums Posts: 6,806	Originally posted by Lowell Goudge 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
crewl1 Site Supporter Join Date: Jul 2010 Location: Los Angeles, CA Photos: Gallery \| Albums Posts: 9,807	Did you all see this? Originally posted by tscip22 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
Tom S. Veteran Member Join Date: May 2008 Location: S.E. Michigan Photos: Albums Posts: 4,317	Originally posted by crewl1 Did you all see this? Maybe he hasn't looked at the road map lately.

07-25-2012, 12:41 PM	#700
Quicksand Pentaxian Join Date: Apr 2008 Location: Central Ohio (formerly SF Bay Area) Posts: 1,519	Quote: 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 ça change...

07-25-2012, 12:47 PM	#701
ElJamoquio Veteran Member Join Date: Feb 2011 Posts: 4,873 Original Poster	Originally posted by crewl1 Did you all see this? Nope. That is truly awesome. Sigh....

07-25-2012, 02:29 PM	#702
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	Please send him a link to the roadmap...

07-25-2012, 02:32 PM	#703
Blue Moderator Site Supporter Join Date: Jun 2008 Location: Florida Hill Country Photos: Gallery \| Albums Posts: 17,377	The representative needs a good >

07-25-2012, 10:41 PM	#704
rvannatta Pentaxian Join Date: Aug 2007 Location: Apiary, Oregon Photos: Gallery Posts: 1,181	Originally posted by french_mike i was talking about the smaller lens -> DA50-135, someone said it was the DA300 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
LamyTax Veteran Member Join Date: Jul 2012 Posts: 376	Originally posted by ElJamoquio 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.