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Forum: Pentax K-01
12-04-2016, 09:28 AM
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Affordable zoom lenses will have lower image quality. The macro primes I mentioned will give you top notch quality and are often used for documentary photos, product shots, and even for digitalizing older media. You don't need all of them. I would recommend something like the DFA 50mm and then you just focus it and move the camera/tripod closer until the photo almost covers the frame. You have the 55-300mm, you can try it out, and you can check whether 100mm is better for you than 50mm. Macro primes have great image quality, render a lot of detail, they have flat field of focus (so the painting reproductions would be sharp even in corners), and good colour reproduction as well, with little vignetting. Filters you can just unscrew and put them on the other lens. Most Pentax primes are 49mm and 52mm, I think.
You can get an older 50mm macro prime, like FA or F series. They would be more affordable. I just think a macro prime would give you much better image quality and low light capabilities than the 55-300mm zoom.
Also, from your post I see that you are mixing up "zoom" and "telephoto" and "magnification" . Zoom just means you can change the focal length of the lens. It does not mean that you shows far away subjects as close. Showing far away things as if they are close is the opposite of wide angle - it is telephoto. Magnification is different still. Magnification means the lens has close focusing capabilities relative to its focal length. For example, you can buy 21mm and 200mm lens, but they will both only have 0.17x magnification (though, they will achieve this at a different distance from the subject - 21mm will be very close, but the 200mm will be farther). The Pentax macro lenses have true 1:1 magnification. This means it will let you focus much closer. This might be required for small objects and smaller works. For large ones you can just step further back.
Switching lenses is one of the things a photographer has to do. Sure, you can use the DA 55-300mm lens and have it do almost everything for you. If you are happy with its results, then no need to change. If you want top notch results, you will have to take more control and use the right tools for the job. I suggest you work with this first. I think this lens has distance scales to help you focus. Just remember that the distance on the lens focus scales counts from the lens sensor (4.5cm inside of the camera from the lens mount), not from the end of the lens.
If my post is too confusing, just ignore it. I can't help myself getting technical
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Forum: Pentax K-01
12-03-2016, 11:37 AM
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I also don't understand the reason for choosing the 55-300mm.. Are the paintings so far away? For things like Paintings I would recommend DFA 100mm macro, DA 35mm macro, DFA 50mm macro.. (Or Sigma 105mm, Tamron 90mm or older FA and F series macro primes).
It might be just too dark, because the DA 55-300mm has much less brightness than the fast 50mm prime. This also affects AF. Can you try the lens on a normal camera, not converted? Try to narrow down the problem
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