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An Opteka 85mm F1.4 Review

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patrik.f View Drop Down
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Post Options Post Options   Quote patrik.f Quote  Post ReplyReply Direct Link To This Post Topic: An Opteka 85mm F1.4 Review
    Posted: 21 July 2012 at 07:20
I use the Samyang 85mm with A850. With the standard focusing screen(type L) I found fucusing very hard. Maybe I nailed 1 of 10.
First I replaced the focusing screen with a type M. That improved my results significant but not enough to make me confident. I considered to try the sony FDAM1AM magnifier but i understand that it decreases the viewable angle so in the end it wouldn't make focusing easier. After a while i read about the KPS eyepiece with 1.35 magnification. I bought one and it really made a difference. Now with enough light and a stationary object I manage to focus correct in 99% of the cases.
 



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iullian View Drop Down
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Post Options Post Options   Quote iullian Quote  Post ReplyReply Direct Link To This Post Posted: 13 June 2012 at 12:01
Actually, I'm the unfortunate one that completely destroyed the chip while trying to glue it. I ended with glueing the entire chip and all the electronics were damaged. I tried to clean the connectors but... nothing happened. But, in my angryness I bought the A77 to solve the problem (focus peaking is a real marvel with this lens).
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tigertimb View Drop Down
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Post Options Post Options   Quote tigertimb Quote  Post ReplyReply Direct Link To This Post Posted: 31 August 2011 at 13:17
I'm looking forward to this aspect with a number of fast AF lenses too - with shallow DOF manual focussing when using the peaking or 1:1 is going to be a lot easier and also likely to give better results than focusing and recomposing.
Tim
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Post Options Post Options   Quote utcreeper Quote  Post ReplyReply Direct Link To This Post Posted: 31 August 2011 at 11:49
I suspect the A77 focus peaking will make this a very popular lens, if only in my own bag.   
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Post Options Post Options   Quote Jocelynne Quote  Post ReplyReply Direct Link To This Post Posted: 31 August 2011 at 03:55
WHAT A BLAST! I am totally impressed. What a wonderful group of experts, all of you! This is a terrific illustrated essay. A superb tour de force. Once again, I prove my policy: I always try to associate with people who are better than I am. Dyxum does it again. I love you all!   
Maxxum 450si, Sony A300, A700, A900 and a cubic meter of Alpha lenses
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ponz View Drop Down
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Post Options Post Options   Quote ponz Quote  Post ReplyReply Direct Link To This Post Posted: 31 August 2011 at 02:36
Originally posted by teejay teejay wrote:

Just thought I'd share my evening's work: successful chipping of the samyang!! I followed Slipsale's guide on the french forum alphadxd, all you need is some two component epoxy patty, and a file. A 1h job.
Here are the results:


TJ,

Is that the M42-a/MAF ?? If so, did you file the small tab off the middle of the arc? No filing of the original lens mount? Simply build up some epoxy on the underside of the chip so it's flush with the ring?

Ponz
a900,& quite a few lenses
 



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drice23 View Drop Down
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Post Options Post Options   Quote drice23 Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2011 at 15:01
has anyone else tried this modification besides Exminolta. he has written great instructions, but I just want to know who all has tried this modification. I am wanting to try the mod for myself. I just need a confidence booster first.
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teejay View Drop Down
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Post Options Post Options   Quote teejay Quote  Post ReplyReply Direct Link To This Post Posted: 24 February 2011 at 05:25
Just thought I'd share my evening's work: successful chipping of the samyang!! I followed Slipsale's guide on the french forum alphadxd, all you need is some two component epoxy patty, and a file. A 1h job.
Here are the results:
Sony a99|HLV42|Minolta 17-35/2.8-4|24-105/3.5-4.5|28-105/3.5-4.5|24/2.8|35/2|35/1.4|50/1.4|85/1.4|100/2.8mRS|135/2.8|200/2.8|TC1.4|Sigma 180/5.6
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trainerKEN View Drop Down
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Post Options Post Options   Quote trainerKEN Quote  Post ReplyReply Direct Link To This Post Posted: 23 November 2010 at 21:59
Originally posted by teejay teejay wrote:

@trainerKen- have you changed your viewfinder screen on a900? The position of the screen influences your vision of the focus point - it can be adapted via 'shims' - thin plastic sheets you mount with the screen.
Could diopter adjustment be also the culprit?


I haven't touched the viewfinder screen... would I have to change this going from lens to lens?
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teejay View Drop Down
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Post Options Post Options   Quote teejay Quote  Post ReplyReply Direct Link To This Post Posted: 23 November 2010 at 21:52
@trainerKen- have you changed your viewfinder screen on a900? The position of the screen influences your vision of the focus point - it can be adapted via 'shims' - thin plastic sheets you mount with the screen.
Could diopter adjustment be also the culprit?
Sony a99|HLV42|Minolta 17-35/2.8-4|24-105/3.5-4.5|28-105/3.5-4.5|24/2.8|35/2|35/1.4|50/1.4|85/1.4|100/2.8mRS|135/2.8|200/2.8|TC1.4|Sigma 180/5.6
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trainerKEN View Drop Down
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Post Options Post Options   Quote trainerKEN Quote  Post ReplyReply Direct Link To This Post Posted: 23 November 2010 at 21:32
...so, about 3 weeks ago, I picked up this lens used locally (actually from a member of Dyxum), and took some awesome pictures with my a550... last week I picked up a a900 (yes, I've been spoiling myself ), and finally got around to mount it on the FF body today... took it out and discovered there's a major back focus issue    I started thinking there was something wrong with the lens, so went back and mounted it on the a550 again... and no problems. Has anyone else experienced this? Is there a remedy?

Edited by trainerKEN - 23 November 2010 at 21:33
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ConfuciusTse View Drop Down
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Post Options Post Options   Quote ConfuciusTse Quote  Post ReplyReply Direct Link To This Post Posted: 03 November 2010 at 01:54
I have my Rokinon version and a chip I got on Ebay (I can't find James Lao!). Anyway, the chip has a tab on the outer curve that basically requires cutting into the mount which I am very hesitant to do. Also the bottom of the chip has a bump in the middle (think of a see-saw) so simple super glue won't work either.

Would be great if the A-mount version came pre-chipped (like the Nikon one). I'd be willing to pay a premium for that.

I actually find myself manually focusing pretty well but a quick green chirp would eliminate the zoom focus check step. Also, I had originally thought my A33 would default SSS to 50mm but it appears to be off altogether without a chip. Maybe I'm wrong though...any way to check?
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le_huf View Drop Down
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Post Options Post Options   Quote le_huf Quote  Post ReplyReply Direct Link To This Post Posted: 04 July 2010 at 12:10
thanks for sharing. i ordered my chip several weeks ago but didn't have the heart to attach it without a good documentation. can't wait to try it out by myself.

happy shooting
le_huf
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Post Options Post Options   Quote Grodan74 Quote  Post ReplyReply Direct Link To This Post Posted: 25 June 2010 at 12:35
Thanks :)

Regarding the warranty, I'll worry about it the day I have to. It's not the most expensive lens, and perhaps I can buy a mount from someone if I need warranty-repair. But as I said, Come the day, come the sorrow, or as in sweden: den dagen den sorgen

//Albin
α300 | Samyang 85/1.4 | Sony 50/1.8 | Kit-lens | Minolta 70-210 f4.5-5.6 | Minolta 28-85 f3.5-4.5 | F42 |
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