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Old Apr 8, 2007, 2:23 PM   #1
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Hello,

I am trying to decide between a Sony PlayStation 3 and another lens and a flash for my K10D. I want a good Macro lens I am considering (I only buy Pentax brand now) the SMCP-D FA 50mm f/2.8 Macro or the SMCP-D FA 100mm f/2.8 lens.

Does any one have either of these lenses that could send me a couple of full size macro shots (as close to the subject as possible) so I can take a look at them?

Also, which would you recommend and why?

The flash I am looking at the Pentax 540.

Robert
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Old Apr 8, 2007, 2:37 PM   #2
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Also, can someone explain...

On the B&H site for the 50mm it says:

"Built-in focus-clamp mechanism to fix focus at any distance"

What does this mean?

On the B&H site for the 100mm it says:

"Features the FREE (Fixed Rear Element Extension) focusing system, effectively reducing annoying aberrations at any focusing distance"

What does this mean?

Thanks,

Robert
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Old Apr 8, 2007, 4:40 PM   #3
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I'd say you'd have to search to find a bad dedicated macro lens. I've got the Pentax SMC-M 100 mm f4. It's manual everything, but I can't see why autofocus should be crucial for macro. And being a fast lens lover (I've got some of the fastest Pentax lenses, and I love them and use them wide open) I can't see that this would be important for macro shots. Normally you have to stop down to f11 or f16 to get an acceptable DOF. Go for longer focal length, it allows you to focus a little bit further away from your subject. If you could consider a third party lens, the Vivitar 105 mm is highlyrecommended by it's usersin this forum. I don't have it, the Pentax 100 mm f4 fulfills all my expectations when shooting macro.

Kjell

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Old Apr 8, 2007, 5:20 PM   #4
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Great shot of the bee.

Robert
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Old Apr 9, 2007, 2:22 AM   #5
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I'd go for longer lens regardles fo brand. 50mm macro gives you 1:1 magnification at around 5cm from front element of the lens while 100mm is more than 10cm. it makes difference for small critters (bugs or butterflies) as the furter you are from them the less they are distracted.

as for pentax macro I have no idea. I got Vivitar series1 105mm macro and it's fantastic lens. 20 years old but built like a tank and fantastic image quality.

greg
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Old Apr 9, 2007, 2:35 AM   #6
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Thanks.

Robert
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Old Apr 9, 2007, 3:38 PM   #7
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Great shot of the bee.

I agree with the necessity for a proper macro lens.

I tried all sorts of different ways first - close-up filter, reversing ring, and extension tubes. All that was a waste when I finally won a macro lens on ebay for a fair price.

Only 1:2 with the close-up filter at 18", but 1:1 with the filter at about 6".

Such a difference and so much easier.



Darren
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Old Apr 9, 2007, 3:48 PM   #8
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Dal1970 wrote:
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Great shot of the bee.

I agree with the necessity for a proper macro lens.

I tried all sorts of different ways first - close-up filter, reversing ring, and extension tubes. All that was a waste when I finally won a macro lens on ebay for a fair price.

Only 1:2 with the close-up filter at 18", but 1:1 with the filter at about 6".

Such a difference and so much easier.



Darren
and look at all you learned in the process

AF isn't needed doing amcros. it's more of a lean in/out to focus. get the macro and then get the cords you need to get the flash off camera. best money you'll ever spend is for the cable.

roy
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Old Apr 9, 2007, 4:10 PM   #9
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I sent my Sigma back for re-chipping last week. Once that returns, I am hoping that the K10D will be able to use the sigma in wireless mode. Otherwise I am looking at £80 for hotshoe adapters and cable.


Darren
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Old Apr 9, 2007, 8:35 PM   #10
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I second the vote for a 100mm over a 50mm macro. I wish that Tamron or Sigma made their 180mm macro in a Pentax mount. Also, on the older Pentax macros, many only went to 1:2, generally the ones that are 1:1 are the f/2.8 models. Just FYI if 1:1 is important to you.

Tim
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