Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-12-2014, 05:47 PM   #166
Pentaxian




Join Date: Nov 2011
Photos: Gallery | Albums
Posts: 3,703
QuoteOriginally posted by jimr-pdx Quote
why is the roadmap always in a different spot on the web?
When I'm traveling on the road, my roadmap is always in a different spot.

02-12-2014, 06:16 PM   #167
Veteran Member
steve1307's Avatar

Join Date: Mar 2010
Location: Sydney
Photos: Gallery | Albums
Posts: 1,129
QuoteOriginally posted by Gray Quote
Unfortunately, no. Bad news for us DA 60-250 owners.

The DA 60-250 has unacceptably heavy vignetting from 85mm to 250mm when used with a full frame camera.

Sample images.

well i was a bit sceptical about the 60-250 when doing the post above.....

Google translated"
By the zooming, gloom is beginning to appear in the four corners ... slightly.  "135mm"  , "250mm" It was all right in the 60mm wide-angle end, but the shadow of vignetting may have occurred in the four corners lens barrel according to extend by zooming to the telephoto side. The check again in another place.  "60mm"  , "85mm"  , "135mm"  , "250mm" effect of zooming it has come out more clearly that it is the subject of this place. "
Oh yes that is perfectly clear now.

And the preview for the in depth review on this site also shows the corners pretty clearly.
DA* 60-250mm Lens and Full-frame - Photographic Articles - PentaxForums.com
appears to cover more than the APS-circle but not the FF.


The photozone test shows minimal vignetting on APS-C (compared to most APS-C lenses)

but looking at the result on the long end at f4 with an APS-C test, pretty obvious its going to be clearly darkened on FF

So... there a no DA zooms that are completely usable, uncropped, wide open at the FL extremities.
But i guess you could use it as a 1.1kg DA*60mm f4 prime


Well (as posted before) at least the patent on the "new" Telezoom on the roadmap has an "image height" 21.64mm ie a 43.28mm circle covering the full 36 x 24. No need to test that one with film whenever it comes out. We can test it on FF digital instead
02-12-2014, 06:47 PM   #168
Loyal Site Supporter
monochrome's Avatar

Join Date: Mar 2008
Location: Kirkwood (St. Louis) MO
Photos: Gallery | Albums
Posts: 20,193
QuoteOriginally posted by dansamy Quote
At this point, there is no "new FF body" on the horizon. Still just hopeful dreams of customers.
You might be surprised in about 9 months.

QuoteOriginally posted by D1N0 Quote
Nope there is.
^^
02-12-2014, 06:48 PM   #169
Loyal Site Supporter




Join Date: Nov 2013
Location: Alabama
Posts: 2,450
QuoteOriginally posted by monochrome Quote
You might be surprised in about 9 months.

^^
Did I miss an announcement somewhere?

02-12-2014, 07:27 PM - 1 Like   #170
Site Supporter
boriscleto's Avatar

Join Date: Dec 2009
Location: Liverpool, NY
Photos: Gallery
Posts: 12,757
QuoteOriginally posted by dansamy Quote
Did I miss an announcement somewhere?
9 months would be Photokina where any FF announcement would be made. Which is why he included the
02-12-2014, 07:40 PM   #171
Loyal Site Supporter




Join Date: Nov 2013
Location: Alabama
Posts: 2,450
Ahh. I see. I know when all the major gaming/Sci fi/comic cons are, but I don't know when the major photography ones are.
02-12-2014, 07:40 PM   #172
Loyal Site Supporter
monochrome's Avatar

Join Date: Mar 2008
Location: Kirkwood (St. Louis) MO
Photos: Gallery | Albums
Posts: 20,193
QuoteOriginally posted by dansamy Quote
Did I miss an announcement somewhere?
QuoteOriginally posted by boriscleto Quote
9 months would be Photokina where any FF announcement would be made. Which is why he included the
2nd to last line. Search more posts by user name.
02-12-2014, 08:01 PM   #173
Veteran Member




Join Date: Mar 2007
Location: Boston, PRofMA
Photos: Albums
Posts: 3,053
QuoteOriginally posted by aurele Quote
why is it a weird range for APS ? It's perfectly fine to me
Because Pentax has continuously told us:

"yes, we do have a 70-200 *equivalent* in our 50-135, so we don't need to re-release the FA70-200"

02-12-2014, 08:06 PM   #174
Pentaxian




Join Date: Nov 2011
Photos: Gallery | Albums
Posts: 3,703
QuoteOriginally posted by kenyee Quote
Because Pentax has continuously told us:

"yes, we do have a 70-200 *equivalent* in our 50-135, so we don't need to re-release the FA70-200"
Nevertheless, having an 18-35 "equivalent" in the 12-24, they still "re-released" the FA 20-35 (as the DA 20-40).
02-12-2014, 10:37 PM   #175
Pentaxian
thibs's Avatar

Join Date: Jun 2007
Location: Belgium
Photos: Albums
Posts: 5,230
QuoteOriginally posted by lytrytyr Quote
Nevertheless, having an 18-35 "equivalent" in the 12-24, they still "re-released" the FA 20-35 (as the DA 20-40).
I thought 20-40 had nothing to do with 20-35 ?

---------- Post added 13-02-14 at 06:40 ----------

QuoteOriginally posted by Alizarine Quote
Not sure about the price of, say the Nikkor 35 1.8G (FX) but if the DA35 2.4 really works fine on FF then it's probably one of the cheapest options out there. Lucky buyers!

...well, IF Pentax releases an FF that is.
Pretty sure the 35/2.4 will work fine (vigneting-wise), it is nothing but an FA35/2.
02-12-2014, 11:03 PM   #176
mee
Site Supporter




Join Date: May 2010
Posts: 5,761
QuoteOriginally posted by thibs Quote
I thought 20-40 had nothing to do with 20-35 ?

---------- Post added 13-02-14 at 06:40 ----------



Pretty sure the 35/2.4 will work fine (vigneting-wise), it is nothing but an FA35/2.
Is there any way to get it to perform as an f/2 lens then?
02-12-2014, 11:09 PM   #177
Pentaxian
thibs's Avatar

Join Date: Jun 2007
Location: Belgium
Photos: Albums
Posts: 5,230
QuoteOriginally posted by mee Quote
Is there any way to get it to perform as an f/2 lens then?
Probably not. The may have done the same as the K55/2 and K55/1.8 Strictly identical but the /2 didn't open the aperture as much as the /1.8.
Something along those lines I guess but even if you did manage to do so, the electronics wouldn't follow.
IMO it really is too much, specially on a cheapo lens.
02-12-2014, 11:46 PM - 1 Like   #178
Veteran Member
steve1307's Avatar

Join Date: Mar 2010
Location: Sydney
Photos: Gallery | Albums
Posts: 1,129
QuoteOriginally posted by thibs Quote






Pretty sure the 35/2.4 will work fine (vigneting-wise), it is nothing but an FA35/2.
QuoteOriginally posted by mee Quote
Is there any way to get it to perform as an f/2 lens then?
.
.


Well it's supposed to be the same optical formula as the FA 35/2.

In theory you could shave off a tiny bit of the inner edge of each the apeture blades (not with a dremel )
and then it might go out to f2 possibly with some vignetting if the new lens barrel design "shades it".

Now, ..If you didn't completey destroy it during the surgery the apeture might only stop down to something like f6.3 instead of f22 and the lens contacts would report the same apeture as before.

Maybe better to just stick with the f2.4 and be happy with that.

The owners of FA35/2 are happy because their lens is f2 and still worth more money on the used market.
02-13-2014, 06:31 AM - 4 Likes   #179
Senior Member




Join Date: Oct 2013
Photos: Albums
Posts: 292
QuoteOriginally posted by Gray Quote
Unfortunately, no. Bad news for us DA 60-250 owners.

The DA 60-250 has unacceptably heavy vignetting from 85mm to 250mm when used with a full frame camera.

Sample images.

Thatīs right,No real fullframe quality.Cause it is no ff patent,only the old prototype was a fullframe patent.
The second,current version is no ff patent,you can see thin in the corner picture quality.
The DA*200 is the old FA* patent with new coating,new ED element and mechanical changes.
The DA*300 is complete new and optical a fullframe lens.
Converter is also a fullframe lenssystem.

Best regards
02-13-2014, 07:39 AM   #180
Pentaxian




Join Date: Nov 2011
Photos: Gallery | Albums
Posts: 3,703
QuoteOriginally posted by thibs Quote
I thought 20-40 had nothing to do with 20-35?
Here are the respective diagrams, from Ricoh-Pentax and Boz Dimitrov:






The arrangement of the first three elements, with the second being aspherical, is very similar.
In the DA 20-40, the final extraordinarily-low dispersion element replaces the final aspheric element of the FA 20-35.
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!
advantage, camera, circle, dof, f2.8, ff, k-mount, k-mount lens roadmap, lens, lenses, patent, pentax, pentax news, pentax rumors, pentax-da*, picture, posts, promise, roadmap, rumor, sdm, smc, surprise, tamron lenses, time, tokina, weather, yay
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pentax K-mount Lens Roadmap Archive (from 2005 on) Asahiflex Pentax SLR Lens Discussion 18 02-24-2017 07:26 AM
Updated Lens Roadmap Phil A Pentax Q 2 06-25-2013 01:53 PM
Pentax Q Lens roadmap updated... wanderography Pentax News and Rumors 23 10-03-2012 03:35 AM
Updated roadmap for 645 mount ogl Pentax Medium Format 9 09-26-2012 12:00 PM
New lenses roadmap, updated 22/09/2008 (pdf) cateto Pentax News and Rumors 55 09-28-2008 06:35 AM



All times are GMT -7. The time now is 04:56 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