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09-25-2008, 07:33 PM   #1
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Extending DA* 60-250mm

Now that there is a 60-250mm that people have seen does anyone have any indication of how far it extends while zooming. This is my big fear associated with this lens and to be honest I'm not sure why Pentax would consider having it extend.

Surely someone has seen it in person and is not covered by a NDA, it is a public event.

09-25-2008, 08:04 PM   #2
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QuoteOriginally posted by omega leader Quote
Now that there is a 60-250mm that people have seen does anyone have any indication of how far it extends while zooming. This is my big fear associated with this lens and to be honest I'm not sure why Pentax would consider having it extend.

Surely someone has seen it in person and is not covered by a NDA, it is a public event.
Are you sure? I thought this was an internal zoom lens.
09-25-2008, 08:30 PM   #3
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QuoteOriginally posted by omega leader Quote
Now that there is a 60-250mm that people have seen does anyone have any indication of how far it extends while zooming. This is my big fear associated with this lens and to be honest I'm not sure why Pentax would consider having it extend.
From what I've recently read & learned about internally zooming lenses, and that all sacrifice the long end if you focus to less than infinity and only give you the rated focal length when @ infinity, some appreciable, I have to hope that this not being an internal focus lens, when I focus on something 10 feet away @ 250mm, I'll really be getting 250mm, not 50mm - 100mm less.
09-25-2008, 08:36 PM   #4
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QuoteOriginally posted by m8o Quote
From what I've recently read & learned about internally zooming lenses, and that all sacrifice the long end if you focus to less than infinity and only give you the rated focal length when @ infinity, some appreciable, I have to hope that this not being an internal focus lens, when I focus on something 10 feet away @ 250mm, I'll really be getting 250mm, not 50mm - 100mm less.
What? I don't get it.

09-26-2008, 09:31 AM   #5
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Tamron 18-250mm

Strange, this differs from the behavior observed with the Tamron 18-250mm, but if internal zoom lenses sacrifice long end quality I can support that. If it is only a minor extension (i.e. 1" or so) I can forgive it; if however it extends like the Sigma 135-400mm than I can't; furthermore does anyone know if there is an zoom lock?

So many questions, so little answers. (I'm looking at a Tamron 70-200mm, hence the questions)


QuoteOriginally posted by m8o Quote
From what I've recently read & learned about internally zooming lenses, and that all sacrifice the long end if you focus to less than infinity and only give you the rated focal length when @ infinity, some appreciable, I have to hope that this not being an internal focus lens, when I focus on something 10 feet away @ 250mm, I'll really be getting 250mm, not 50mm - 100mm less.
09-26-2008, 09:53 AM   #6
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a certain someone on this site had this lens a certain time ago and had posted some comments about it and then got into alot of shit from a certain someone

those that had a chance to read that post might have remembered that i had asked if the lens extends, and indeed it does.
09-26-2008, 09:58 AM   #7
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It has been know to extend for a while, ever since that person, who shall remain nameless and blameless (a misunderstanding).

But there is extending (i.e. Sigma 24-70mm Macro, perhaps 1" or 10%) and EXTENDING (i.e. Bigma, Sigma 135-400mm at >6" and almost 100%).

The first I almost don't consider to extend, the latter I certainly do.
09-26-2008, 10:03 AM   #8
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Regarding the concerns that the focal length will change when focussing, note that internal zoom != internal focus. Of course I don't know if this lens has internal focus...

09-26-2008, 07:57 PM   #9
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QuoteQuote:
Whow, that thing is huge! The zoom extends significantly towards the long end - throw in the long and narrow hood and you look at something easily twice as long as the usual product images suggest that we use to look at. And it's heavy. You get what you pay - about one gram for each and every of the 1,300 € you're supposed to spend.
Photokina Impressions, Part 3 - Lenses: Pentax SLR Talk Forum: Digital Photography Review
09-27-2008, 06:26 AM   #10
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Drat

Drat, I don't like the sound of that, I will await pictures of the lens extended, but I think the quality of the Tamron at 200mm is too good to pass up, especially at half the price.
09-27-2008, 07:16 AM   #11
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There is this... which says
Facts
67mm filter size
Inner focussing. (no rotation or external dimension change)
Internal zoom (no change in length during zooming, as with the 50-135)
Removable tripod mount (actual shot of the mount on the 60-250 below)

other photos here
Pentax Equipment Photo Gallery by Kees de Haan at pbase.com
Pentax da 60-250 old new.jpg photo - Kees de Haan photos at pbase.com
09-27-2008, 07:27 AM   #12
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QuoteOriginally posted by kunik Quote
There is this... which says
Facts
67mm filter size
Inner focussing. (no rotation or external dimension change)
Internal zoom (no change in length during zooming, as with the 50-135)

Removable tripod mount (actual shot of the mount on the 60-250 below)

other photos here
Pentax Equipment Photo Gallery by Kees de Haan at pbase.com
Pentax da 60-250 old new.jpg photo - Kees de Haan photos at pbase.com
Where do you see these 'facts', because everything I've heard says it changes
length while zooming.


.
09-27-2008, 07:29 AM   #13
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QuoteOriginally posted by kunik Quote
There is this... which says
Facts
67mm filter size
Inner focussing. (no rotation or external dimension change)
Internal zoom (no change in length during zooming, as with the 50-135)
Removable tripod mount (actual shot of the mount on the 60-250 below)

other photos here
Pentax Equipment Photo Gallery by Kees de Haan at pbase.com
Pentax da 60-250 old new.jpg photo - Kees de Haan photos at pbase.com
This is what I have heard and believe it to be also..I would hate to think that such an expensive lens would have external zoom. This is one of the things that endears me to the 50-135 F/2.8
09-27-2008, 07:30 AM   #14
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a pic from a hong kong web sitehttp://www.dcfever.com/articles/news/2008/09/080927_photokina_17.jpg
09-27-2008, 07:40 AM   #15
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QuoteOriginally posted by yipchunyu Quote
Oh my, so it does extend? That would be a deal killer for me.
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