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10-23-2013, 08:48 PM   #1
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hi there

I am a newborn photographer and have been using a pentax camera for 5 years. I started with the k-m and now have the k-5 (since approx one year ago). I am having major focus issues and am wondering if it's my lens or my body. I use the 50mm 1.4 and looking for a 35 mm. I'd love a 70-200 lens, as well as an 85mm lens. I'm curious about 28-75mm but not sure if I would sacrifice sharpness by not getting a fixed lens. Still learning a lot about everything

10-23-2013, 08:57 PM   #2
kat
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Here is an image from my latest session.
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10-23-2013, 09:44 PM   #3
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Awww, sweet!

Welcome, Kat!
10-24-2013, 12:55 AM   #4
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Welcome to PF and bonjour from France ... enjoy the forum and your K-5 ... please post us another image or two soon ... Salut, J

10-24-2013, 04:36 AM   #5
PJ1
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Welcome to the Forums, kat. That is a nice image. You can probably get some ideas on your focus issues here, as well as some advice on how to fix it. Check the "Articles" section. There is one on fixing front-focus and back-focus. I like to 50/1.4 but I hardly use mine enough. I would not worry too much about loss of sharpness with a zoom lens. Many of the modern ones are very good (some old ones were too) and you will probably not notice any real loss of sharpness except with very large prints. (OK - some clients might want very large newborn images!) But sharpness will tend to fall off towards the edges anyway, and that is not necessarily a bad thing in portraits. Others here probably use zoom lenses professionally and may be able to advise. But you will know best what you need for your work.
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