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09-25-2011, 11:04 PM - 1 Like   #1
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Magnification Tests: Raynox 150 w/Tamron 18-250mm and Pentax 100mm Macro

Hi all,

Just figured this would be of good reference material for anyone thinking of picking up a Raynox DCR150 to see how the magnification increases on these two lenses. I did the same 'test' with the Tamron 70-300mm back when I had that lens and decided I would do the same with the two lenses I have now.

I was surprised to see that the 70-300mm was able to magnify much more than the dedicated 100mm Macro was, but I guess that's just a factor of the extra 200mm focal length at play there.

If you would like to compare these results with those of the Tamron 70-300mm, check out the pics on the old thread here.

Hope some people find the comparisons useful. Without a doubt, I would easily recommend the Raynox DCR150 to anyone. It is well worth the $50 or so!




Last edited by Arrvon; 01-26-2012 at 03:43 PM.
09-25-2011, 11:11 PM   #2
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Thanks for your samples. I have my eye on the Raynox 150 and possibly the 250 as well. The 150 should be fun with my SMC-M 100mm/F2.8 and the DA 50-300mm.
09-26-2011, 01:51 AM   #3
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QuoteOriginally posted by Catalana Quote
Thanks for your samples. I have my eye on the Raynox 150 and possibly the 250 as well. The 150 should be fun with my SMC-M 100mm/F2.8 and the DA 50-300mm.
You may or may not know that the DCR-150 is +4.8 dioptres and the DCR-250 is +8dpt. They have the same magnification as some cheap +dioptre closeup adapters stacked to give the same +dioptre number; but the Raynoxi are corrected, and much better optically.

If you get a DCR-150, you can stack 49mm adapters on it; a +1+2dpt pair stacked on it give almost the same magnification at a DCR-250, so you could get an idea of whether buying the -250 makes sense. The main difference (besides magnification) is working distance. WD for the -150 is about 6in-7.5in; for the -250 is about 5in.
09-27-2011, 05:15 PM   #4
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Thanks for making the differences more clear. I was just checking the prices for the Raynox, and it seems that they have increased by some ~50%. I thought this a bit steep and have decided to just wait and get a proper macro, i.e. the Pentax 100mm or Tamron 90mm. Bad experiences with Sigma and their service put them out of consideration.

09-27-2011, 05:52 PM   #5
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Here's the formula for finding magnification with closeup adapters:

[ M = F * D / 1000 ]

where M is magnification, F is host lens focal length, and D is dioptre of the add-on lens.

So putting a Raynox DCR-250 (+8dpt) on a DA55-300, we get numbers like this:

at 55mm: 55*8/1000 = 0.44x
at 135mm: 135*8/1000 = 1.08x
at 300mm: 300*8/1000 = 2.4x

Anyone with a calculator can plug in the numbers for other lenses and adapters.
____________________________________________________________________

As for Raynox prices: I search eBay and see both the DCR-150 and -250 going for less than US$60 each, shipped. The IQ of either is much better than with stacked closeup mensicus sets, which (for larger diameter lenses) are not astoundingly cheaper. Yes, a dedicated macro lens will be cleaner, but will cost rather more. It will probably weigh a bit more too. Yes, I adore my M42 Vivitar-Komine 90/2.8 macro (480g). But I always have my DCR-250 in my bag, and I'm more likely to clip it onto my Isco Westar 100/4.5 (170+70= 240g), half the weight.

My recommendations:

If IQ is paramount and money isn't tight, get a dedicated AF macro lens.
If IQ is paramount and money IS tight, use macro tubes.
If IQ and convenience are important, use a Raynox.
If IQ is less important, use cheap closeup lenses.
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