Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-07-2012, 09:44 PM   #31
Forum Member




Join Date: May 2009
Location: Dallas, TX
Photos: Gallery
Posts: 76
That new lens looks really interesting. Limited build style so far. Is it a 35mm (too close to 40XS) or 21mm?
Talk about a really small lens/camera combo. Loving the K-01 concept to date.

02-07-2012, 11:25 PM   #32
ogl
Banned




Join Date: Dec 2007
Location: Sankt Peterburg
Photos: Gallery | Albums
Posts: 8,382
QuoteOriginally posted by yipchunyu Quote
Just checked the new lens announcement and they really go for this direction. Great

http://www.pentax.jp/english/news/announce/info-image/20120208_6.jpg
02-08-2012, 12:35 AM   #33
Pentaxian




Join Date: Apr 2007
Location: Sweden
Posts: 2,106
Ouch, is that a mirrorless lens only, or is is standing on something?
02-08-2012, 12:41 AM   #34
Pentaxian




Join Date: Apr 2008
Location: Central Ohio (formerly SF Bay Area)
Posts: 1,519
Well, it's going to need a funky rear cap, that much is certain.

02-08-2012, 11:52 AM   #35
Forum Member




Join Date: Mar 2011
Location: Houston
Posts: 94
QuoteOriginally posted by Quicksand Quote
Well, it's going to need a funky rear cap, that much is certain.
My bet is it is a 28mm F2.8, for mirrorless only because of its giant butt
02-08-2012, 12:05 PM   #36
Forum Member




Join Date: Feb 2012
Posts: 87
I wonder if there's enough space where the mirror used to be to allow deeper lenses AND not screw up the angle of light hitting the sensor. Symmetrical designs like the Biogon are great on film because film grains don't care about the angle that light hits it. Digital sensors are quite a bit more picky. Still, if they could make a 28,, lens that performs as well as the other limited lenses, I might be able to get by with a single walk around lens...
02-08-2012, 12:05 PM   #37
Veteran Member
eddie1960's Avatar

Join Date: Aug 2010
Location: Toronto
Photos: Gallery | Albums
Posts: 13,666
QuoteOriginally posted by feishui Quote
My bet is it is a 28mm F2.8, for mirrorless only because of its giant butt
maybe even a 21 reworked?? Or if there is a FF mirrorless on the horizon maybe this is a FF compliant mirrorless pancake normal lens

02-08-2012, 12:14 PM   #38
Banned




Join Date: Sep 2006
Location: Millstone,NJ
Posts: 6,491
QuoteQuote:
Its a bit disappointing that they can't work on the standard SLR. The 40XS design is also apparently a fixed focus lens,
That would be like saying Its a bit disappointing Apple can't work on the iPhone 5. It's unreal that people think the 40XS is a fixed focus lens since the specs say it will AF as close as 15.72". So @F2.8 this 60mm (FF eqiv) lens would have a DOF of 0.4in !

Last edited by jogiba; 02-08-2012 at 12:44 PM.
02-08-2012, 01:59 PM   #39
Pentaxian




Join Date: Apr 2008
Location: Central Ohio (formerly SF Bay Area)
Posts: 1,519
So how long do we need to wait for REAL information on this mystery XS lens? It's already Thursday in Japan -- but early morning. Will we learn more today?

(For the record, I'm going to guess 23mm f/2.8. Because why not? There's no reason to be constrained by existing Pentax lenses, since this apparently has a new lens formula.)
02-08-2012, 10:24 PM   #40
Forum Member




Join Date: May 2008
Location: BC
Posts: 93
I'm with you quicksand. 19mm F2.2 Let's make this thing funky.
02-09-2012, 12:20 AM   #41
Veteran Member
ytterbium's Avatar

Join Date: Jan 2008
Posts: 1,076
QuoteOriginally posted by yipchunyu Quote
I know that K-01 has the same flange focal distance (k-mount). However, since it doesn't has the mirror inside the camera. Can pentax make use of the space and make the future lens much smaller (as if part of the lens tube sit inside the camera)?
I doubt this can be done. There is just too little space inside the camera.

Maybe only with very simple and slow lenses using small elements and minimal mechanics (no zoom / collapsing mechanism helixes). If i look at the back of my lenses, many of them, not even fast ones, use up quite a lot of the area mount offers. They could be shaved down a little, but i don't think as much as would be required to fit them in the sensor sized box.

But hey. If they can stick a reasonably bright (f/2) 16, or 24 mm "pancake" down that hole, i might change my thoughts about the K-01.

And at f/2, without counting in any element housing tubes, guard spacing or any other technical details, knowing the K-01's APS-C (23.7 x 15.7 mm) sensor size, you could fit a 15.7*2=31.4 [mm] or wider lens in there.

BTW, the diameter of Panasonic's 20/1.7 lens optical elements is roughly 21mm and that is for a non-retrofocus lens.
02-09-2012, 02:04 AM   #42
ogl
Banned




Join Date: Dec 2007
Location: Sankt Peterburg
Photos: Gallery | Albums
Posts: 8,382
https://www.pentaxforums.com/forums/pentax-news-rumors/174815-more-photos-cp.html

more photos
02-09-2012, 03:59 AM   #43
Veteran Member
ytterbium's Avatar

Join Date: Jan 2008
Posts: 1,076
A birck has been shat! It seems that they will actually stick it down the box, good... good...
Front element looks bigger than this:

What you think about curvature? Looks like retrofocus to me and the outter surface of front element has less curvature than inner one. At this distance and size, i'd say 20mm or less. Front and rear element sizes visually remind me KIT lens, so i wouldnt be too optimistic about the speed. The finish certainly looks like LTD.

Last edited by ytterbium; 02-09-2012 at 04:13 AM.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, k-01, k01, lens, lens design, mirrorless, pentax k-01

Similar Threads
Thread Thread Starter Forum Replies Last Post
Quirks of Lens Design nanhi Pentax SLR Lens Discussion 14 01-17-2012 06:03 AM
theoretical lens design question tibbitts Pentax SLR Lens Discussion 10 04-17-2011 02:17 PM
FA Limited lens series won the 2010 Good Design Long Life Design Award Patriot Pentax SLR Lens Discussion 26 11-29-2010 06:16 AM
Lens Kit Design Poll Lowell Goudge Pentax SLR Lens Discussion 38 11-09-2010 06:32 AM
Poll on lens kit design Lowell Goudge Pentax SLR Lens Discussion 8 10-29-2010 11:58 AM



All times are GMT -7. The time now is 05:40 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top