Pentax 300 mm f4 SMCP-DA lens
Jul 13, 2015 11:04:17 #
Any Pentax user have this lens and if so do you like it?
Sharp? Reliable focus? Can you use an extender on it? Thanks.
Sharp? Reliable focus? Can you use an extender on it? Thanks.
Jul 13, 2015 12:40:03 #
Jul 13, 2015 13:08:07 #
Cdouthitt wrote:
http://www.pentaxforums.com/lensreviews/SMC-Pentax-DA-Star-300mm-F4-SDM-Lens.html
Well it certainly gets good ratings- thanks.
Jul 14, 2015 08:10:15 #
I have that lens and currently using it on a K3. Very pleased with it. And the Pentax 1.4x HD PENTAX-DA AF Rear Converter AW for K-Mount Lenses is supposed to be a match for it although I haven't tried it yet.
Jul 14, 2015 11:57:16 #
jackglisson wrote:
I have that lens and currently using it on a K3. Very pleased with it. And the Pentax 1.4x HD PENTAX-DA AF Rear Converter AW for K-Mount Lenses is supposed to be a match for it although I haven't tried it yet.
Glad to hear from someone using the lens- thanks.
Two separate questions-
How does the camera and lens combo work for birds/ BIF? Have you used it for that purpose?
And one other question- do you know if vintage Pentax lenses will fit the K 3 mount or is an adapter needed?
Jul 14, 2015 15:01:23 #
I have always felt that Pentax is lagging behind on auto-focus. The SDM focus seems better than in the past though but still a little slow for BIF - that being said, I usually try to shoot at a low ISO. Yes I have several older lenses and they all work fine on the K3. Prob my most commonly used is an older FA100 2.8. I will do some more experiments on BIF next time I get to go to Florida!
Jul 14, 2015 15:52:13 #
jackglisson wrote:
I have always felt that Pentax is lagging behind on auto-focus. The SDM focus seems better than in the past though but still a little slow for BIF - that being said, I usually try to shoot at a low ISO. Yes I have several older lenses and they all work fine on the K3. Prob my most commonly used is an older FA100 2.8. I will do some more experiments on BIF next time I get to go to Florida!
Thanks again for the information- just what I needed to know.
Jul 14, 2015 16:00:47 #
I am not very good at BIF but here is an example of that combination.
Jul 14, 2015 16:03:07 #
Jul 14, 2015 18:43:24 #
suntouched wrote:
And one other question- do you know if vintage Pentax lenses will fit the K 3 mount or is an adapter needed?
And one other question- do you know if vintage Pentax lenses will fit the K 3 mount or is an adapter needed?
No adapter needed except for the M42 screw mount lenses. Otherwise all previous generation K-mount lenses are useable without adapters and with varying degrees of automation.
Jul 14, 2015 18:51:19 #
Jul 14, 2015 19:55:23 #
Cdouthitt wrote:
Gonna use it on your em10?
That thought crossed my mind but then I thought if I do it will only be in manual focus and I can't catch a bird in auto focus so maybe not :)
Jul 14, 2015 19:57:13 #
lsimpkins wrote:
No adapter needed except for the M42 screw mount lenses. Otherwise all previous generation K-mount lenses are useable without adapters and with varying degrees of automation.
I have some old Pentax lenses I use on my Olympus M-10 with an adapter- really like the lenses.
Jul 14, 2015 20:43:35 #
suntouched wrote:
I have some old Pentax lenses I use on my Olympus M-10 with an adapter- really like the lenses.
The Pentax ones I have are m42 mounts. Sometimes the aperture pin can be an issue, but I found this adapter that doesn't interfere with it...this is the only one I found that works with my 135mm f2.5 lens.
http://www.amazon.com/Fotasy-AM42M-Adapter-Focusing-Helicoid/dp/B00E7HRGCC/ref=sr_1_2?ie=UTF8&qid=1436920864&sr=8-2&keywords=Helicoid+m42+to+m43
It's a helicoid too, which helps shorten up the minimum focus distance.
Jul 14, 2015 21:45:13 #
Cdouthitt wrote:
The Pentax ones I have are m42 mounts. Sometimes the aperture pin can be an issue, but I found this adapter that doesn't interfere with it...this is the only one I found that works with my 135mm f2.5 lens.
http://www.amazon.com/Fotasy-AM42M-Adapter-Focusing-Helicoid/dp/B00E7HRGCC/ref=sr_1_2?ie=UTF8&qid=1436920864&sr=8-2&keywords=Helicoid+m42+to+m43
It's a helicoid too, which helps shorten up the minimum focus distance.
http://www.amazon.com/Fotasy-AM42M-Adapter-Focusing-Helicoid/dp/B00E7HRGCC/ref=sr_1_2?ie=UTF8&qid=1436920864&sr=8-2&keywords=Helicoid+m42+to+m43
It's a helicoid too, which helps shorten up the minimum focus distance.
And it's reasonably priced. I just ordered one- thanks.
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