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04-17-2011, 01:07 PM - 1 Like   #1
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SMC Pentax-A* 1:1.8 135mm sample thread

I think this lens deserves its own thread. I got one on loan for a few weeks, just to see if it lives up to the hype and my expectations. I know the lens has a reputation for showing PF easily and sure enough it does, but not nearly as much as I thought. I think it's on the same level as the 135mm f/2.5 Super-Multi-Coated Takumar with regards to PF.

And yes, it definitely lives up to the hype. It's insanely sharp and contrasty right from wide open. However, it does not focus as smooth as the K series and all Takumars. The A series definitely has a worse build. Also, I found it very hard to focus with the K-5's stock screen. I have many shots where I missed the focus entirely.

Please note: the camera registers the widest f/stop of the lens as f/1.7 and this is reflected in the EXIF.

Enjoy! There will be more to come in the next few weeks...

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04-17-2011, 01:40 PM   #2
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QuoteOriginally posted by Asahiflex Quote
I found it very hard to focus with the K-5's stock screen. I have many shots where I missed the focus entirely
For this reason, I changed over to the Katzeye screens for this lens and other fast lenses that I use daily.

Certainly helped me to "nail it" on most occasions.

Last edited by Kerrowdown; 04-18-2011 at 02:14 PM.
04-18-2011, 10:54 AM   #3
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A few more from today... #5 shows the CA.
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04-18-2011, 11:07 AM   #4
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Wow, the purple fringing in pictures 7 and 8 of the first post is unbearable! It's all over the child's shirt and shoes. And those white flowers...

04-18-2011, 02:31 PM   #5
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Peter, all all these at f1.8?!?
04-18-2011, 02:41 PM   #6
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1.8-2.8 last set. check the exif.
the fly with f/1.8 is amazing!
04-18-2011, 03:46 PM   #7
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Peter, try some on your 5D?
04-25-2011, 03:38 AM   #8
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I hope you don't mind my adding a sample.

[1/500s, f7.1, ISO 250]


EXIF FL is wrong, btw: I forgot to tell the camera I'd switched lenses.

04-25-2011, 02:38 PM   #9
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Who did you convince to loan you this beauty?
04-25-2011, 02:40 PM   #10
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I've found live view to be critical in focusing with my 135/1.8. With it on, I usually hit what I'm looking for.
04-25-2011, 11:27 PM   #11
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QuoteOriginally posted by dadipentak Quote
I hope you don't mind my adding a sample.
Of course not, please show us more like these!
04-25-2011, 11:29 PM   #12
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QuoteOriginally posted by Clinton Quote
Who did you convince to loan you this beauty?
I won't disclose any names of course

And indeed, focusing with this lens is much harder than I thought it was. I don't have problems focusing 135mm f/2.8's, but at f/1.8 it becomes nearly impossible to nail the focus.
04-26-2011, 04:29 AM   #13
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QuoteOriginally posted by Asahiflex Quote
at f/1.8 it becomes nearly impossible to nail the focus.
True. Fortunately, I don't often feel the need to shoot wide open.
04-26-2011, 06:16 AM   #14
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QuoteOriginally posted by dadipentak Quote
True. Fortunately, I don't often feel the need to shoot wide open.
It's nice that it's possible though...

04-26-2011, 08:39 AM   #15
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Nice one!
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