Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
04-26-2009, 03:48 AM   #1
Senior Member




Join Date: Dec 2008
Location: RSM, CA
Photos: Gallery
Posts: 277
I.R.'s Pentax 15mm f/4 Review

I found the last statement very interesting, see if you catch it:

"As appropriate, we shoot these with both full-frame and sub-frame bodies, at a range of focal lengths, and at both maximum aperture and ƒ/8. For the ''VFA'' target (the viewfinder accuracy target from Imaging Resource), we also provide sample crops from the center and upper-left corner of each shot, so you can quickly get a sense of relative sharpness, without having to download and inspect the full-res images. To avoid space limitations with the layout of our review pages, indexes to the test shots launch in separate windows."

Either that is a typo, or they have some sort of conversion adapter for another brand of body, don't you think? Or, they have themselves a FF pre-pro body. I doubt it is the latter because they only show the K10D as a test body, which to me is pretty lame. They should be able to afford a K20D body, if anything to see how well the lens resolves micro contrast, and its overall resolving power.

Either way they seem to come to near the same conclusion as DPR only they manage to do so without some sort of typical DPR backhanded nose upturned comment, which is why I always prefer I.R.'s reviews to DPR's.

Carl

p.s. oops forgot the link:
http://www.slrgear.com/reviews/showproduct.php/product/1247/cat/45


Last edited by Rush2112; 04-26-2009 at 03:50 AM. Reason: adding URL
04-26-2009, 04:24 AM   #2
Forum Member




Join Date: Apr 2008
Location: Australia
Photos: Albums
Posts: 81
Actually, I read that last statement as a blanket statement, generally pertaining to any lens tested - not specifically the DA15ltd.

I don't quite see how you came to this conclusion: "Either that is a typo, or they have some sort of conversion adapter for another brand of body"

Thanks for the link. I hadn't come across that site before.

Paul
04-26-2009, 05:12 AM   #3
Veteran Member
mattdm's Avatar

Join Date: Feb 2007
Location: Boston, MA
Photos: Gallery
Posts: 2,964
QuoteOriginally posted by Rush2112 Quote
Either that is a typo, or they have some sort of conversion adapter for another brand of body, don't you think? Or, they have themselves a FF pre-pro body. I doubt it is the latter because they only show the K10D as a test body, which to me is pretty lame. They should be able to afford a K20D body, if anything to see how well the lens resolves micro contrast, and its overall resolving power.
That's boilerplate ó it's there on the Olympus lens reviews too.
04-26-2009, 05:43 AM   #4
Site Supporter
Sailor's Avatar

Join Date: Nov 2006
Location: Coastal Texas
Photos: Gallery
Posts: 18,811
Thanks for posting this, Carl. Like Paul, I was unaware of this site.

The lack of sharpness of the DA 15 reported in tests and annecdotal observations is a bit disappointing, but perhaps some sharpness has to be sacrificed to produce a 15 mm lens this small with very little distortion (the three laws of thermodynamics dictate you can't get sumpin' for nuttin'). Also, real-world shots that have been posted look very good - at least to my bleary old eyes.

Jer

04-26-2009, 06:32 AM   #5
Veteran Member




Join Date: Nov 2008
Location: UmeŚ, Sweden
Posts: 755
Key word: "as appropriate". So, full frame is "not appropriate" with APS-C lenses, much like it is not appropriate to shoot a prime lens "at a range of focal lengths".
04-26-2009, 06:37 AM   #6
Veteran Member




Join Date: Nov 2008
Location: UmeŚ, Sweden
Posts: 755
This review has a pretty embarassing fault though:
QuoteQuote:
Tokina 12-24mm É/4 AT-X 124 AF PRO DX ~$400 This is probably the strongest alternative. [...] If absolute sharpness is crucial and you don't mind trading away quite a bit of bulk to get it, though, the Tokina 12-24mm É/4 AT-X 124 AF PRO DX (or the new, more expensive II version) may be a stronger choice.
ŅQue? The Tokina 12-24 is not available in K mount...
04-26-2009, 06:44 AM   #7
Veteran Member
ManuH's Avatar

Join Date: Dec 2007
Location: Montreal
Photos: Gallery | Albums
Posts: 1,209
QuoteOriginally posted by Erik Quote
This review has a pretty embarassing fault though:

ŅQue? The Tokina 12-24 is not available in K mount...
It is available as the Pentax DA 12-24/4. But they also talk about version II with motors which is not available to Pentax.
04-26-2009, 07:07 AM   #8
Veteran Member




Join Date: Nov 2008
Location: UmeŚ, Sweden
Posts: 755
QuoteOriginally posted by ManuH Quote
It is available as the Pentax DA 12-24/4. But they also talk about version II with motors which is not available to Pentax.
If you read the review you will note that in the section about alternatives, they first talk about the Pentax 12-24/4, then the Tokina 12-24/4, and conclude that the Tokina is the best alternative. Nowhere do they state that they are the same optical design, or that the Tokina is not available in K mount.

04-26-2009, 10:44 AM   #9
Veteran Member




Join Date: Mar 2008
Location: Rancho Cucamonga, CA
Photos: Gallery
Posts: 379
QuoteOriginally posted by Sailor Quote
Thanks for posting this, Carl. Like Paul, I was unaware of this site.

The lack of sharpness of the DA 15 reported in tests and annecdotal observations is a bit disappointing, but perhaps some sharpness has to be sacrificed to produce a 15 mm lens this small with very little distortion (the three laws of thermodynamics dictate you can't get sumpin' for nuttin'). Also, real-world shots that have been posted look very good - at least to my bleary old eyes.

Jer
It's sharp at f8, where I would use it 99% of the time, and it excels in almost every other way: distortion, flare, etc. This would be a good lens for architecture.
04-26-2009, 11:20 AM   #10
Site Supporter
Sailor's Avatar

Join Date: Nov 2006
Location: Coastal Texas
Photos: Gallery
Posts: 18,811
QuoteOriginally posted by GaryM Quote
It's sharp at f8, where I would use it 99% of the time, and it excels in almost every other way: distortion, flare, etc. This would be a good lens for architecture.
I'm thinking along the same lines, Gary. Besides, for me, the DA 12-24 or DA 14 are too big to lug around for the amount of use they would get. On the other hand, the DA 15 will fit in with my other DA Limiteds or could unobtrusively accompany my DA 18-250.

Jer
04-26-2009, 12:36 PM   #11
Veteran Member




Join Date: Dec 2006
Location: Copenhagen
Photos: Gallery
Posts: 1,845
QuoteOriginally posted by GaryM Quote
It's sharp at f8, where I would use it 99% of the time, and it excels in almost every other way: distortion, flare, etc. This would be a good lens for architecture.
Yes, I don't think I'll find sharpness an issue in everyday shooting, (particularly if I like the rendering). But I'm very happily surprised my lack of distortion, and flare.


Thanks for the link to I.R.'s review. I actually find it a very good review.

Edit :
We discussed the DPr review, with Andy Westlake :
http://forums.dpreview.com/forums/readflat.asp?forum=1036&thread=31682688

The DPr review also compares to the Tokina version. It is common knowledge that the Tokina doesn’t come in Pentax mount, but that there is the Pentax 12-24/4 instead

Last edited by Jonson PL; 04-26-2009 at 10:57 PM.
04-26-2009, 01:21 PM   #12
Senior Member




Join Date: Oct 2008
Posts: 278
They could tested it on 5D body, but we already know it doesn't cover the FF area on a Pentax film camera.
04-26-2009, 03:39 PM   #13
Veteran Member




Join Date: Sep 2008
Location: Tri-Cities, British Columbia
Photos: Gallery
Posts: 1,784
Plastic filter threads? Is that correct?
04-27-2009, 02:55 AM   #14
RaduA
Guest




QuoteOriginally posted by legacyb4 Quote
Plastic filter threads? Is that correct?
He meant on the filter itself not on the lens which is entirely metallic (including the cap).

Radu
04-27-2009, 09:22 AM   #15
Veteran Member
benjikan's Avatar

Join Date: Jan 2007
Location: Paris, France
Photos: Gallery
Posts: 4,312
QuoteOriginally posted by Erik Quote
If you read the review you will note that in the section about alternatives, they first talk about the Pentax 12-24/4, then the Tokina 12-24/4, and conclude that the Tokina is the best alternative. Nowhere do they state that they are the same optical design, or that the Tokina is not available in K mount.
The multi coating, SDM and external design are what differentiates the Pentax from the Tokina, but the optical formula is the same.
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!
body, dpr, pentax 15mm f/4, pentax news, pentax rumors, review, sort, target, test
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
pentax 15mm review dpreview vs potozone Alex00 Pentax SLR Lens Discussion 22 04-22-2010 04:22 PM
DA 15mm Photozone Review!! K206 Pentax SLR Lens Discussion 2 10-19-2009 08:17 AM
News DA 15mm Lens added to Lens Review Database Adam Site Suggestions and Help 0 05-13-2009 02:38 PM
DPR review the DA 15mm ltd F4 Adrian Owerko Pentax News and Rumors 32 05-07-2009 11:36 AM
What should be the maximum price for Pentax-A 15mm lens as the DA 15mm is coming up? Mitch34 Pentax SLR Lens Discussion 6 06-24-2008 04:40 PM



All times are GMT -7. The time now is 11:34 AM. | 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