Pentax AF, after experiencing it with the K-01, is far better than what I thought it was. After trying out Sony, Canon and Nikon cameras and lenses these past months, I must state that they are a great disappointment. No, I did not try the highest-priced models (though some of the lenses were mid to high-priced). The claims that are chronically repeated simply do not represent what the cameras and lenses do under actual working conditions. Here is my ultimate example:
In 2017 I tried the Sigma 50-500 with my K-01. It was suggested by some that this combination would be problematic, yet my first simple tests were indoors and the lens successfully focused in each instance. This is not the case with popular well-regarded lenses and cameras from Sony and the others. I was told that it would be ridiculous to expect telephoto zooms to focus with indoor light. Furthermore, I found that the same difficulty or lack of AF occurred with these same cameras and lenses outdoors on overcast days! The K-01 combined with any AF lens I tried in K mount (Tamron, Sigma, Pentax, etc.) all focused in any lighting situation.
I am certain that if I purchased the most recent $3000 to $5000 cameras the AF may have been better. If I had also purchased the upper tier lenses along with those upper-tier cameras they may have been further aided in focusing indoors, but I still have my doubts.
The K-01 was always regarded as a camera with very limited AF ability, even among Pentax fanatics. I have not tried other Pentax digital cameras, but gauging the situation by K-01 AF, the others should be fantastic.
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I though I should add that I think it would be a good time for Pentax to introduce or re-introduce an updated K-01 or similar mirrorless camera. As a professional film photographer I have worked daily only with optical finders and for film photography they are sufficient. For faster-paced digital imaging, an electronic finder is much more suitable. The OVF/reflex mirror combination is more suitable for film photography. The K-01 illustrated that a Pentax camera could maintain its character while omitting the OVF/reflex mirror assembly.
In 2017 I tried the Sigma 50-500 with my K-01. It was suggested by some that this combination would be problematic, yet my first simple tests were indoors and the lens successfully focused in each instance. This is not the case with popular well-regarded lenses and cameras from Sony and the others. I was told that it would be ridiculous to expect telephoto zooms to focus with indoor light. Furthermore, I found that the same difficulty or lack of AF occurred with these same cameras and lenses outdoors on overcast days! The K-01 combined with any AF lens I tried in K mount (Tamron, Sigma, Pentax, etc.) all focused in any lighting situation.
I am certain that if I purchased the most recent $3000 to $5000 cameras the AF may have been better. If I had also purchased the upper tier lenses along with those upper-tier cameras they may have been further aided in focusing indoors, but I still have my doubts.
The K-01 was always regarded as a camera with very limited AF ability, even among Pentax fanatics. I have not tried other Pentax digital cameras, but gauging the situation by K-01 AF, the others should be fantastic.
--
I though I should add that I think it would be a good time for Pentax to introduce or re-introduce an updated K-01 or similar mirrorless camera. As a professional film photographer I have worked daily only with optical finders and for film photography they are sufficient. For faster-paced digital imaging, an electronic finder is much more suitable. The OVF/reflex mirror combination is more suitable for film photography. The K-01 illustrated that a Pentax camera could maintain its character while omitting the OVF/reflex mirror assembly.
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