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Forum: Pentax SLR Lens Discussion
01-16-2019, 01:36 PM
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Thanks for the responses and photo's everybody! Seems like a 1.4 teleconverter (if any) makes the most sense out of the available options for this particular lens.
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Forum: Pentax SLR Lens Discussion
01-14-2019, 02:25 PM
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Thanks for the quick and elaborate response, Normhead! I would indeed mainly be buying it for the A400mm, but the results do appear to be underwhelming :(.
The pictures taken without the adapter are gorgeous though! I guess I will focus on getting myself closer to the birds for now and getting more experience with the lens :)
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Forum: Pentax SLR Lens Discussion
01-14-2019, 01:32 PM
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I recently bought a second hand SMC Pentax-A 400mm F5.6 prime lens, mainly for bird photography, because it seemed like a nice upgrade from the Pentax 55-300mm AF lens.
So far I've really been enjoying the challenge (the manual focussing, and increased weight) and the results are definitely a lot nicer than the 55-300 zoomlens.
By now however I'm tempted to try and get the most out of this lens by adding the SMC Pentax-F 1.7x AF Adapter to it. It makes sense to me for the following reasons:
1. It's a prime lens, so the sharpness is quite good, which makes me think it would pair well with a teleconverter. It would make it a 680mm lens, which seems awesome for bird photography
2. It would add (limited?) Auto Focus functionality to this prime lens, which could be useful, but I'm not sure how well this could work, as the adapter officialy only supports F2.8 or faster lenses. From what I've gathered it should still work reasonably well to quite well, depending on the weather circumstances.
3. The camera I would use it with is a K-30, would the full potential of this combination be reached on this camera, or does it have certain limitations?
Can anyone tell me if this combination is likely to be worth it, as the AF adapter would be relatively expensive for me to acquire? And has anyone tested the AF functionality with a Prime lens like mine?
I'm mostly interested in bird photography (both handheld and from a tripod) for now, and I'm still pretty much a beginner - this is my first SLR Camera.
Thank you in advance!
Greetings,
Michael
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