Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
01-13-2010, 12:49 PM   #1
New Member




Join Date: Dec 2009
Posts: 7
rokinon 85mm f1.4 vs pentax fa 50mm f1.4?

Hello,

I'm looking for a new lens that can shoot with a lot more light and I was looking at either the Rokinon 85mm f1.4 and the pentax fa 50mm f1.4. They are roughly the same price ($250-$300) so I was wondering which would be a better choice.

One thing to note is that one of the big reasons for wanting a wider lens is so I can shoot better indoor/night/lowlight videos with my new Pentax K-x. My hope is that a wider lens with reduce some of the noise/grain issues I've been having with lowlight video.

Thanks

01-13-2010, 01:07 PM   #2
Forum Member




Join Date: Dec 2009
Posts: 72
Hi,

First of all "wider" lens is a lens that gets more into the picture, i.e. low mm numbers.
You are talking about a "faster" lens.

I have a Pentax-A 50mm/1.7 and a Rokinon 85mm 1.4 clone.
The Rokinon and clones are a tad softer than the fast 50s, I believe. Even stopped down to 2.2.
Part of that is that the subject isolation with a 85mm lens is quite big. This can be an interesting thing to play with.

But generally, if it is your first prime, I would go with the FA 50mm, because it is autofocus and more useful. If you find you need something longer, I would buy the Rokinon later.

Dan.
01-13-2010, 01:31 PM   #3
Veteran Member
StephenMerola's Avatar

Join Date: Feb 2009
Location: Southeast Wisconsin
Photos: Albums
Posts: 391
I have both. I would think that the focal length of the 85mm would be too long for most indoor situations...unless you are doing theater, concerts, or something similar. Even the FA 50 is a tad long indoors for me. Both are good lenses. I feel that the FA 50mm is a little soft until about f/2, maybe f2.5. The Rokinon is VERY sharp from f1.4 to around f/4 (give or take). The FA 50mm will beat the Rokinon 85mm after f4 for sure. It is pretty much confirmed that the 85mm was made to be sharp wide open and as a result suffers just a bit at medium apertures.

Both lenses are great and should make you happy. Obviously the FA is auto focus, which is nice.
01-13-2010, 01:50 PM   #4
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,314
I have a vivitar 85m F1.4 and super tak 85mm F1.9 as well as SMC and Super Tak 50mm F1.4 lenses.

I find 85 mm a little long for indoor portraits. I think today, for Indoor work you need 50mm and perhaps 35 mm, depending on head and shoulders shots or full body, and obviously the size of room / studio you are in.

for outdoor, and candid shots, I like both 85mm and 135 mm as good focal lengths for portraits, but you need space.

01-13-2010, 10:16 PM   #5
Pentaxian
Just1MoreDave's Avatar

Join Date: Feb 2007
Location: Aurora, CO
Photos: Gallery | Albums
Posts: 4,815
The Rokinon has a minimum focus distance of 1 meter, which may also be a problem. The FA50/1.4's distance is 0.49 meters.
01-14-2010, 05:02 PM   #6
Pentaxian
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
Ther 85 would be if all you want are head shots. The 50 would be if all you want are head and shoulder / shots. Neither would be my first choice for basic indoor shooting - you need something wider. I'd say you're better off with a 28 or 35, even if "only" f/2.8 (that's still twice as good as the kit lens).
01-20-2010, 01:35 PM   #7
Senior Member




Join Date: Nov 2009
Location: San Jose
Photos: Gallery | Albums
Posts: 149
Like Marc mentions above, for indoor shots I'd recommend a different lens (The 16-50mm DA* 2.8 comes to mind), but if I had to choose (as you've set forth) I would go with the FA 50mm 1.4 hands down.

I have both lenses and the 50mm is much more usable based solely on a slightly wider focal range AND of course the Auto focus.

Since you're primarily focusing on Video - also keep in mind that a wider focal length lets you get closer to the subject - in the case where you're using the in-camera mic.
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!
50mm, f1.4, f1.4 vs pentax, fa, k-mount, lens, pentax, pentax fa 50mm, pentax lens, slr lens, vs pentax fa
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Rokinon 85mm f/1.4 vs SMC Pentax-M 85mm F2, which one to choose? YJD Pentax SLR Lens Discussion 110 09-09-2012 11:11 PM
Rokinon 85mm 1.4 ajtour Pentax SLR Lens Discussion 9 05-23-2010 01:10 PM
ROKINON 85MM F1.4 LENS NEBULA_ONE Pentax SLR Lens Discussion 7 03-12-2010 10:51 AM
Rokinon 85mm 1.4 on the K-7 Pentaxor Pentax SLR Lens Discussion 0 11-07-2009 06:30 PM
Rokinon MF 85mm f/1.4 first test jogiba Pentax SLR Lens Discussion 10 06-26-2009 04:50 PM



All times are GMT -7. The time now is 03:12 AM. | See also: NikonForums.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