Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-14-2016, 05:32 AM   #46
Site Supporter
dakight's Avatar

Join Date: Sep 2014
Location: Phoenix, AZ
Photos: Albums
Posts: 1,178
QuoteOriginally posted by Imp Quote
The DA 50 1.8 that is designed for aps-c actually covers the FF image circle. Its not all that odd, if i'm correct its based off of the prior f/1.7 50mil lenses? Sorta like how the current 40mm limited lens covers the FF circle because its based off of the old M 40mm design


I saw some vignetting with the DA 50 wide open but stopping down cleaned it right up.

05-14-2016, 05:53 AM   #47
Pentaxian
FantasticMrFox's Avatar

Join Date: Oct 2014
Location: Scotland
Posts: 2,119
QuoteOriginally posted by dakight Quote
I saw some vignetting with the DA 50 wide open but stopping down cleaned it right up.
The usual vignetting or 'made for APS-C' vignetting? All fast primes show vignetting, at f/1.8 the 31 Ltd. shows 1.1 EV even on APS-C, the corners of the Sigma 35 'Art' are about 2 EV darker than the centre at f/1.4 on full frame.
05-14-2016, 06:29 AM   #48
Site Supporter
dakight's Avatar

Join Date: Sep 2014
Location: Phoenix, AZ
Photos: Albums
Posts: 1,178
QuoteOriginally posted by FantasticMrFox Quote
The usual vignetting or 'made for APS-C' vignetting? All fast primes show vignetting, at f/1.8 the 31 Ltd. shows 1.1 EV even on APS-C, the corners of the Sigma 35 'Art' are about 2 EV darker than the centre at f/1.4 on full frame.


I'm not sure I would know the difference. I just know that I see very dark corners wide open but they even out as I stop down. I haven't done a formal test. I see it at f1.8; I do not see it at f8.
05-14-2016, 09:51 AM   #49
Veteran Member




Join Date: Dec 2007
Location: traverse city MI
Posts: 341
QuoteOriginally posted by Winder Quote
I'm pretty sure he is trolling. Anyone can look at the B&H catalog and see that what he says is false. In 2 years he has made 5 posts.
What he said. and the D750 is not old by any means.

---------- Post added 05-14-2016 at 01:11 PM ----------

QuoteOriginally posted by MikeD Quote
What he said. and the D750 is not old by any means.
Ok so I stand corrected. Didn't see how many pages on this thread, duh.

I won't be going with the K1 only because the burst rate doesn't fit my much of my subject matter, everything else is great. I shoot a lot of ski racers going 45 mph and up I need 7 + burst rate, minimum, so I sit with money in hand waiting for the K3 III, sigh.

05-14-2016, 11:20 AM - 2 Likes   #50
bxf
Site Supporter
bxf's Avatar

Join Date: Jul 2010
Location: Lisbon area
Posts: 1,118
QuoteOriginally posted by HopelessTogger Quote
How many lenses does a person need?
As few or as many as it takes to justify some complaint
05-14-2016, 11:29 AM - 1 Like   #51
Site Supporter
dakight's Avatar

Join Date: Sep 2014
Location: Phoenix, AZ
Photos: Albums
Posts: 1,178
QuoteOriginally posted by HopelessTogger Quote
B&H lists 47 full frame lenses in K-mount . . .

SLR Lenses, DSLR Lenses | B&H Photo Video

How many lenses does a person need? Presently, my lenses for the K-1 include . . .

Samyang 14mm f/2.8
smc Pentax-FA 31mm f/1.8 Limited
smc Pentax-FA 43mm f/1.9 Limited
smc Pentax-FA 77mm f/1.8 Limited
Pentax-K 50mm f/1.2
Pentax-FA 50mm f/1.4
Pentax-M 50mm f/1.7
Revuenon MC 55mm f/1.2
Pentax D-FA 100mm f/2.8 Macro WR
Tair 11A 135mm f/2.8 M42
Carl Zeiss Distagon T* 35mm f/2 ZK
Carl Zeiss Planar T* 85mm f/1.4 ZK

. . . and soon to add . . .

D-FA 15-30/2.8
D-FA* 70-200/2.8

I really don't need anything else. If anything I'm holding far too many (considering the cost, GULP!)

That's easy... how many lenses do I need? One more; just one more.
05-14-2016, 11:31 AM   #52
Pentaxian




Join Date: Jan 2016
Location: Roi-et, Thailand
Posts: 773
QuoteOriginally posted by dakight Quote
That's easy... how many lenses do I need? One more; just one more.
Aye! I was saying to Ming Thein over email the other day, "that's it, I'm finished buying new glass!" Ten minutes later ordered a Zeiss Planar 1.4/85 ZK.
05-14-2016, 11:40 AM   #53
Pentaxian
normhead's Avatar

Join Date: Jun 2007
Location: Near Algonquin Park
Photos: Gallery | Albums
Posts: 25,809
QuoteOriginally posted by photodesignch Quote
I haven't got it yet! Using A7 here.. no need to upgrade at all. but I use a lot of PENTAX glasses on it. The result is simply amazing even A7 is "old tech".
Sounds like a real patchwork solution. That was fine when it was the only solution. Now it's more money for something that doesn't work as well.


Last edited by normhead; 05-14-2016 at 01:23 PM.
05-14-2016, 12:52 PM   #54
New Member




Join Date: Feb 2014
Location: San Diego
Posts: 10
Original Poster
QuoteOriginally posted by Simen1 Quote
In night clubs AF modules could easily struggle with to little light to work reliably. Luckily the K-1 AF module work down to -3 EV. The D750 and 5D Mark III does that too, but the D810 is a step behind with an AF module that stops at -2 EV. That should rule out the D810 for your kind of work.

Large aperture primes are important for that kind of low light work. I guess its not optimal to work with a tripod in the club, so It would be very practical to have a good stabilizer. Canon and Nikon cant help you with that as they rely on lens stabilization systems and don't offer that in large aperture primes. Pentax solves that elegantly by offering in camera stabilization that works with any lens. New or old, Pentax branded or not. Manual focus or not. It just works. That gives you an opportunity to reduce flash intensity and get more natural lighting in your club photos.
thanks for the insight. I wasn't really sold on getting the D810. I really don't like using flash in night clubs since I don't understand how to do flash. I just been guessing. Using a tripod is not possible because of the crowd.
05-14-2016, 01:25 PM   #55
Pentaxian
normhead's Avatar

Join Date: Jun 2007
Location: Near Algonquin Park
Photos: Gallery | Albums
Posts: 25,809
I think we are helping out this guy's cause by posting in this thread. It keeps the message on the top page of the New Posts search. If there was another point to this post, I'm not sure what it might have been.
05-14-2016, 03:11 PM   #56
Veteran Member
Tan68's Avatar

Join Date: Sep 2014
Photos: Albums
Posts: 396
QuoteOriginally posted by dakight Quote
I'm not sure I would know the difference. I just know that I see very dark corners wide open but they even out as I stop down. I haven't done a formal test. I see it at f1.8; I do not see it at f8.
I think normal vignetting will not be very noticeable unless you have a subject with even tones like the sky.. blue sky or a white wall or etc. The transition due to vignetting is gradual and smooth.

Vignetting due to a too small image circle is more abrupt. There will be very noticeable darker corners and likely only the far corners. I imagine this will be similar to a poorly fitting hood or too many filters in a stack.

Vignetting due to either reason is relieved at smaller apertures.
05-14-2016, 10:41 PM   #57
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 27,415
QuoteOriginally posted by Vallista Quote
I really don't like using flash in night clubs since I don't understand how to do flash.
Also likely to encourage the bouncer to toss you out on the street. Flash is hard on the audience eyes and doubly so for the performer.


Steve
05-15-2016, 12:37 AM - 1 Like   #58
Pentaxian
Digitalis's Avatar

Join Date: Mar 2009
Location: Adelaide.
Posts: 8,792
QuoteOriginally posted by stevebrot Quote
Also likely to encourage the bouncer to toss you out on the street. Flash is hard on the audience eyes and doubly so for the performer.
To be fair if they have strobe lights and laser light shows going off I doubt anyone will notice.
05-16-2016, 06:50 PM   #59
New Member




Join Date: Feb 2014
Location: San Diego
Posts: 10
Original Poster
QuoteOriginally posted by stevebrot Quote
Also likely to encourage the bouncer to toss you out on the street. Flash is hard on the audience eyes and doubly so for the performer.


Steve
Night clubs allow photographers to use flash. I work in the night club scene in San Diego. So that is not a problem.
05-16-2016, 07:18 PM   #60
Site Supporter
jpzk's Avatar

Join Date: Jan 2009
Location: Québec
Photos: Gallery | Albums
Posts: 7,255
QuoteOriginally posted by HopelessTogger Quote
Aye! I was saying to Ming Thein over email the other day, "that's it, I'm finished buying new glass!" Ten minutes later ordered a Zeiss Planar 1.4/85 ZK.
That was an interesting choice, and a good one, for your K-1 !
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!
burst, d750, dslr, full frame, full-frame, k-1, k1, lens, lenses, macro, means, pentax k-1, price, rate
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Details on the sensor in the K-1, hands-on impressions and photos Adam Pentax K-1 173 04-28-2016 07:07 AM
Pentax K-1 is already on the #2 spot on cameradecision.com comparison.... shardulm Pentax K-1 31 03-24-2016 10:12 AM
Passing on the Pentax Bug.... brewmaster15 General Photography 19 01-09-2016 02:53 AM
Passing it on joebarfly General Photography 9 08-19-2015 05:11 AM
got the 18-250/AG360FGZ's and a new FA50 1.4... verdict? passing on the 50-135 was a 123K10D Pentax SLR Lens Discussion 6 12-05-2007 07:51 AM



All times are GMT -7. The time now is 06:43 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