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01-23-2014, 06:08 PM   #16
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QuoteOriginally posted by civiletti Quote
If you are not after bokeh, the A50/2.8 is super-sharp close up.
What's wrong with its bokeh?



01-24-2014, 12:07 AM   #17
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QuoteOriginally posted by Ikarus Quote
What's wrong with its bokeh?
Nothing wrong with the A50/2.8 bokeh, but the maximum aperture limits shallow depth of field when background separation is not as great as in your image.
01-24-2014, 02:04 PM - 1 Like   #18
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QuoteOriginally posted by civiletti Quote
Nothing wrong with the A50/2.8 bokeh, but the maximum aperture limits shallow depth of field when background separation is not as great as in your image.
The OP was asking about a "bargain lens for close up of flowers". I'd say at close distances, background separation is the least of our problems. With a 50mm lens on APS-C and a focus distance of 40cm, the DOF is down to 1cm at f/2.8.
01-25-2014, 12:01 AM   #19
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QuoteOriginally posted by Ikarus Quote
The OP was asking about a "bargain lens for close up of flowers". I'd say at close distances, background separation is the least of our problems. With a 50mm lens on APS-C and a focus distance of 40cm, the DOF is down to 1cm at f/2.8.
DOF is shallow, but there is out of focus and there is really out of focus. It often looks good when the background dissolves into color washes. Now, if maximum detail is desired, the A50/2.8 will beat the A50/1.4 at any focal distance, especially close up.

The A50/1.4 is hardly an expensive lens, but it is quite useful for shallow DOF close ups as well as for portraits and general photography. It is well built and not too large for a fast lens.

It seems the OP wants autofocus, though, so neither will fit the bill.

01-25-2014, 06:36 AM   #20
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QuoteOriginally posted by Ikarus Quote
The OP was asking about a "bargain lens for close up of flowers". I'd say at close distances, background separation is the least of our problems. With a 50mm lens on APS-C and a focus distance of 40cm, the DOF is down to 1cm at f/2.8.
Guys, when I said "bargain lens" I meant the new $200. Pentax DA35mm 2.4 vs the new DA50mm 1.8 $200. lens. Sorry if I confused anyone. I'm trying to find out if I will get better IQ and bokeh using the new 50 vs the new 35.
Freddy
01-25-2014, 01:44 PM   #21
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QuoteOriginally posted by fevbusch Quote
I'm trying to find out if I will get better IQ and bokeh using the new 50 vs the new 35.
You can look in th sample database whose bokeh you like better; quite sure you can find some bokeh shots there. But as I said previously, you will not gain magnification.
01-26-2014, 04:12 AM   #22
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Not sure what you mean by "will not gain magnification". I can get within 20" of a flower I'm shooting and if that leaves too much space around the subject I can always crop the edges.
After all, on my K30 body I'm getting very high resolution which should be more than adequate to result in a very high quality shot.
All I'm looking for is the good sharpness I get from the 35mm 2.4 and hopefully a slightly better bokeh. I would then consider it an acceptable replacement for my Sigma 50mm EX Macro lens.
Some of the comments I have gotten is that bokeh fom the 50mm 1.8 will be very good. Freddy
01-26-2014, 04:39 PM   #23
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QuoteOriginally posted by fevbusch Quote
All I'm looking for is the good sharpness I get from the 35mm 2.4 and hopefully a slightly better bokeh. I would then consider it an acceptable replacement for my Sigma 50mm EX Macro lens.
Some of the comments I have gotten is that bokeh fom the 50mm 1.8 will be very good. Freddy
The 50/1.8 would certainly be less of a compromise for close-ups than the 35/2.4, but since bokeh is a function of background separation, which in turn is a function of the subject distance, I would venture to guess that your cropped 50/1.8 shots would struggle to match the appeal of those from the Sigma Macro in many cases, even without considering the resolution loss.

01-26-2014, 05:03 PM   #24
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Thank you, Icarus and everyone else who helped me with this. I've decided I'll have my family buy me the DA50mm 1.8 in March (my birthday). Then If I decide I'm better off with the DA50mm 1.8 I'll sell the Sigma.
I do love the small size and weight of the Pentax. It fits so easily in my camera bag with my DA55-300. Then I'll just use my DA35mm for family shots, because it works so well indoors with its wide angle and great low light
performance (I hate to use flash unless really necessary). Freddy
01-26-2014, 06:49 PM   #25
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One other thought.. have you considered using Extension tubes with your current lenses?

You can get a cheap set of manual focus ones for... cheap hehe.. and it will give you macro-like focusing. That with the Catch-In-Focus would likely work nicely.
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