Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
09-14-2011, 03:16 PM   #16
Pentaxian
Class A's Avatar

Join Date: Aug 2008
Location: Wellington, New Zealand
Posts: 9,193
QuoteOriginally posted by farfisa Quote
... there's other stuff going on here too though, like in the white petals
The shot nicely demonstrates the FA 50/1.4's bokeh CA. I hasn't bothering me in practice (but then I don't shoot a lot this wide).

And look at that crazy bokeh! As I said, it should be possible to use that to one's advantage.

QuoteOriginally posted by farfisa Quote
100% crop. The detail isn't bad for f/1.4, but you really notice the loss of contrast.
Yep, one must not be disappointed with the loss of contrast. It may depend a bit on the lighting conditions. Someone once created a thread which was supposed to demonstrate that all the FA 50/1.4 needed was a proper hood to achieve great sharpness at f/1.4. I wasn't convinced but a hood certainly can help a little, depending on the circumstances.

QuoteOriginally posted by dgaies Quote
True
Peter, this was the only one I could find online taken at f/1.4.
Very nice shot. It also demonstrates that f/1.4 -- with all implied weaknesses -- can be entirely usable in the right conditions and in the right hands.

I hope that, despite all of my critical remarks, it shines through that I'm a big fan of the FA 50/1.4. At US $199 brand new a few years ago, it was an absolute no-brainer. FWIW, Mike Johnston also thinks very highly of the FA 50/1.4:
"For pure picture quality, taking bokeh into account, my considered opinion is that the Pentax 50mm f/1.4 is the best fast fifty (and I say that having carefully tested damn near everything out there). "
That statement was made before some of the more modern fast fifties became available, but is still very strong endorsement, AFAIC.

09-14-2011, 04:26 PM   #17
Veteran Member




Join Date: Oct 2008
Photos: Gallery | Albums
Posts: 550
QuoteOriginally posted by dgaies Quote
True

Peter, this was the only one I could find online taken at f/1.4. I can check at home tonight for the full-sized version so you can see a 100% crop.

K-7 + FA50/1.4 @ f/1.4, 1/60s, iso1600
Are you sure on f1.4 this picture? Interesting. I will try it next week.
09-14-2011, 05:51 PM   #18
Site Supporter




Join Date: Apr 2011
Location: Oklahoma
Posts: 309
Here's a shot at f/1.4
Attached Images
 
09-14-2011, 06:11 PM   #19
Veteran Member
dgaies's Avatar

Join Date: Oct 2009
Location: Maryland / Washington DC
Posts: 3,917
QuoteOriginally posted by Danny Delcambre Quote
Are you sure on f1.4 this picture? Interesting. I will try it next week.
It was definitely taken at f/1.4

09-14-2011, 11:11 PM   #20
axl
Veteran Member




Join Date: Mar 2007
Location: Nove Zamky, Slovakia
Photos: Gallery | Albums
Posts: 7,181
Original Poster
thanks guys, I have to say that the f1.4 on this looks much better then I thought. The DA* is not all that much better IMO...
09-15-2011, 04:30 AM   #21
Veteran Member
RickyFromVegas's Avatar

Join Date: May 2011
Location: Las Vegas
Photos: Gallery
Posts: 366
I agree that it's not too bad at 1.4, but I still don't use it that low. 2.2 is usually as low as I go.
Recently acquired Rokinon 85mm, however, is sharp as a tack at 1.4 compared to FA50mm, granted the focus is accurate since it is manual focus.
09-15-2011, 07:44 AM   #22
Moderator
Site Supporter
Blue's Avatar

Join Date: Jun 2008
Location: Florida Hill Country
Photos: Gallery | Albums
Posts: 17,212
These aren't crops but here is a handheld shot under an old sodium vapor street light during the blue hour. The 1st one is on the K20d & FA 50 at f1.4. The second one is with the K200d and A 50/1.2 at f1.2. Both handheld. The FA shot was taken about 15 minutes earlier than the A shot and are also on a different sensor.



09-15-2011, 08:39 AM   #23
Site Supporter




Join Date: Apr 2011
Location: Oklahoma
Posts: 309
This lens is very sharp, in my experience. You just have to realize the plane of focus at f/1.4 can be quite small. In my picture above, it didn't turn out as well as I had hoped because the plane of focus ended up being about an inch wide. I misjudged it, and didn't get the picture I wanted.

09-15-2011, 10:14 AM   #24
JHD
Veteran Member




Join Date: Jan 2010
Photos: Albums
Posts: 1,407
QuoteOriginally posted by miltona580 Quote
This lens is very sharp, in my experience. You just have to realize the plane of focus at f/1.4 can be quite small.
DOF depends not only on the aperture, but proximity to the subject as well. Wide open near or far the FA50 was way too soft for my liking.
09-15-2011, 03:13 PM   #25
New Member




Join Date: Sep 2011
Posts: 5
QuoteOriginally posted by JHD Quote
DOF depends not only on the aperture, but proximity to the subject as well. Wide open near or far the FA50 was way too soft for my liking.
Yup, what you say is true.

I have a 50mm f1.4 too. It's soft at f1.4 and purple fringing is quite bad at f1.4 especially in bright light. But once stopped down to f1.8, the IQ improve drastically.

And yeah, the AF is really quick especially with k5
09-15-2011, 03:48 PM   #26
Veteran Member
TOUGEFC's Avatar

Join Date: Nov 2009
Location: Brisbane
Photos: Gallery
Posts: 3,561
How accurate is its AF though?
And how does it perform it low light shots?
09-15-2011, 04:32 PM   #27
Veteran Member
crewl1's Avatar

Join Date: Jul 2010
Location: Los Angeles, CA
Photos: Gallery | Albums
Posts: 9,797
AF on the K-5 is accurate and very fast, similar to my DA 40 which is supposed to have very fast AF.
The FA 50 1.4 is a gem for low light work.
09-15-2011, 05:08 PM   #28
Veteran Member
creampuff's Avatar

Join Date: May 2007
Location: Singapore
Photos: Gallery
Posts: 3,955
I have in the past been able to test six copies of the FA 50mm f/1.4 in a local shop. I was buying two copies that day and I definitely detected small subtle differences between all the lenses, which were all new straight out of the box with different serial number ranges and all were made in Japan. So my conclusion is test, test, test if you can because lenses are made in batches and go thru plenty of hand assembly. I've owned the FA 50mm three times and all varied slightly in terms of PF and sharpness. So I can understand why some say the lens is soft which others say it is sharp. This lens definitely needs a deep lens hood due to the large amount of glass on the front element because the contrast does improve noticeably with a hood on, imo.

09-15-2011, 07:43 PM   #29
Veteran Member




Join Date: Aug 2009
Location: New England
Photos: Albums
Posts: 690
QuoteOriginally posted by creampuff Quote
This lens definitely needs a deep lens hood due to the large amount of glass on the front element because the contrast does improve noticeably with a hood on, imo.
Absolutely! This lens does not come with a hood, and it especially should. Nobody, and I repeat nobody should be shooting this lens at f/1.4 without an appropriate hood. (This is probably the #1 thing that muddies up a lot of these discussions about lens performance wide open, all the people who've taken pictures without a hood, which can destroy contrast, and then people will attribute it to the lens and not the lack of a hood...)
10-25-2012, 08:21 AM   #30
Veteran Member
msatlas's Avatar

Join Date: Dec 2009
Location: Madison, WI
Posts: 309
I wouldn't say that an AF adjustment is necessarily an indication of a larger overall problem. It could very well be fine other than the front/back focus.

Good that you got a hood because the lens really needs one. With a hood you can shoot all day long and get sharp results at f/2 or f/2.2.
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!
fa50/1.4, k-mount, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Input from DA* 200mm Owners: Owners Regrets over 300mm ? BBear Pentax SLR Lens Discussion 57 08-12-2013 12:22 PM
Request for K-5 owners: User Manual Edvinas Pentax K-5 10 11-07-2010 08:03 AM
Trouble with SMC F 50mm 1.7, request to F and FA owners tr13 Pentax SLR Lens Discussion 5 09-08-2009 11:53 PM
Request for limited owners and K7 owners Psynema Pentax SLR Lens Discussion 0 07-09-2009 07:11 PM
Request to see some photos with FA50/f1.4 and Raynox 250 raider Pentax SLR Lens Discussion 14 11-04-2008 09:22 AM



All times are GMT -7. The time now is 03:11 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