"SMC PENTAX-DA 1:2.8 40mm Limited" haricinde Pentax-DA lenslerin tamamı Full Frame olmadığı aşağıdaki linkte görülebilir. FF gövdelerde kullanıldığında köşelerde bozulmalar oluşur. FF gövdelerde kullanmaya uygun olmadığı satış sitelerinde özellikle vurgulanıyor.
http://www.pentaxforums.com/lensreviews/category-SMC-Pentax-DA-Lenses.html
Bu lensler APS-C sensörler için üretilmişlerdir.Verdiğiniz linkte özellikle bu vurgulanıyor.FF sensörlere uyumlu olmadıkları belirtilmiyor.Tabii ki en iyi netice APS-C sensörlerden alınıyor.Fakat yazımda listelediğim DA lensler de FF uyumludurlar.
Bir de aşağıda verdiğim yazı ve linkleri gözden geçiriniz:Saturday, October 17, 2009
Compatibility of DA Lenses on Full FrameIn the course of studying the possibility of a Full Frame Pentax DSLR system and how ready the current Pentax lens system (i.e., the DA lineup) would be, I have done an extensive research to find out most of the relevant information in the Internet that have been there so far, as well as to do some tests on my own, all of which are summarised as below:-
DA Prime Compatible? (Yes/No) Reason for NoDA 14/2.8
No Dark Circle, Sample Shot Here
DA 15/4 Limited
No Dark Circle
DA 21/3.2 Limited
No Dark Circle
DA(L) 35/2.4
Yes, Sample Shots Here
-
DA 35/2.8 Macro
No Heavy Vignetting
DA 40/2.8 Limited
Yes -
DA* 55/1.4
Yes -
DA 70/2.4 Limited
Yes, Sample Shots Here
-
DA* 200/2.8
Yes, Sample Shots Here
-
DA* 300/4
Yes, Sample Shot Here
-
DA Zoom Compatible? (Yes/No) Reason for No[/size]
DA 10-17/3.5-4.5
No Dark Circle to Heavy Vignetting from 10 to 14mm
DA 12-24/4
No Dark Circle to Heavy Vignetting from 12 to 16mm
DA 16-45/4
No Dark Circle to Heavy Vignetting from 16 to 20mm
DA* 16-50/2.8
No Dark Circle for the Whole Zoom Range, Sample Shots Here
DA 17-70/4
No Dark Circle for the Whole Zoom Range
DA 18-55/3.5-5.6
No Dark Circle to Heavy Vignetting from 18 to 28mm, see Sample Shots Here
DA 18-250/3.5-6.3
No Dark Circle for the Whole Zoom Range
DA* 50-135/2.8
No Heavy Vignetting from 50 to 100mm
DA 50-200/4-5.6
No Dark Circle for the Whole Zoom Range
DA 55-300/4-5.8
Yes -
DA* 60-250/4
No Heavy Vignetting from 135 to 250mm, see Sample Shots Here
So, there are five primes and one zoom that can be "used". And, not any of the wider DA lenses can be used. But it seems that Pentax has lately decided that their new DA lenses should be made to be Full Frame compatible as the latest DA zoom, the DA 55-300, has shown to be usable on Full Frame. The newer DA* 60-250, unlike other DA tele zooms, has an image circle covers Full Frame also, although the vignetting is serious from 135mm and onwards.
As Pentax has stopped updating their DA lens roadmap since March, it also seems that some important lens lineup revisions are in progress. I hope that they are actually planning for the Full Frame, from all signs that can be seen so far (and also this unconfirmed "leaked" lens roadmapas well).
Nevertheless, do note that when it is "compatible" it just means there is no dark circle nor heavy/obvious vignetting. However, whether the image quality at the image corners are yet acceptable to good would be somehow subjective as using a DA lens on Full Frame is surely not officially tested and guaranteed (at least up to this moment).
Basic References:-
http://forum.xitek.com/showthread.php?threadid=489970 (Simplified Chinese)
http://www.dchome.net/viewthread.php?tid=733914 (Simplified Chinese)
http://info.xitek.com/product/200906/12-20723.html (Simplified Chinese)
http://pentaxforums.com/forums/showthread.php?t=31629http://ricehigh.blogspot.com/2008/10/da-18-55-on-full-frame.htmlhttp://nekonomestill2.blog32.fc2.com/blog-entry-107.html
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22 Nisan, 2020, 08:40:54
