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FORUMS Photography Talk by Genre Macro Talk 
Thread started 23 Jan 2015 (Friday) 13:37
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Playing with a Meike MK-C-UP multifunctional extension tube

 
LordV
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Post edited over 3 years ago by LordV.
     
Jan 23, 2015 13:37 |  #1

First few goes with this adapter which can either be used as an odd electronic extension tube or as I was using a lens reversal adapter that maintains full electronic control of the lens. Tried it with the kit lens. One oddity I noticed during shooting with ETTL flash was the shots were around 1 stop overexposed at my normal flash settings. I think this is because the reversed lens has an aperture around one stop wider than the set aperture. This means needing to shoot with the aperture on the lens about 1 stop smaller than you would normally at any mag and also setting the FEC on the flash about 1 stop -ve to your normal setting.
Mag range with the kit lens was just under 1:1 at 55mm and about 5:1 at 18mm. I hadn't expected to get focus at that focal length but the focus distance was 25mm in front of the adapter ring.

Slightly longer review with more test shots here https://www.flickr.com …iscuss/72157650​033598459/ (external link)

Brian V.

The setup

IMAGE: https://farm9.staticflickr.com/8577/16323568206_e42d2dc832_o.jpg
IMAGE LINK: https://flic.kr/p/qSsy​89  (external link)

IMAGE: https://farm8.staticflickr.com/7535/16323568316_1413b5037c_o.jpg
IMAGE LINK: https://flic.kr/p/qSsy​a3  (external link)

Magnification - min =0.86:1
IMAGE: https://farm9.staticflickr.com/8631/16323568416_28d7e4a744_o.jpg
IMAGE LINK: https://flic.kr/p/qSsy​bL  (external link)

Magnification max =5:1.
IMAGE: https://farm8.staticflickr.com/7557/16323568516_1694e2c4f9_o.jpg
IMAGE LINK: https://flic.kr/p/qSsy​du  (external link)

Single shots at min and max mag
IMAGE: https://farm8.staticflickr.com/7462/16323568686_156601d3e7_o.jpg
IMAGE LINK: https://flic.kr/p/qSsy​gq  (external link)

IMAGE: https://farm8.staticflickr.com/7509/16323568696_e4e6ba53c1_o.jpg
IMAGE LINK: https://flic.kr/p/qSsy​gA  (external link)

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Lester ­ Wareham
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Jan 24, 2015 12:45 |  #2

Interesting stuff Brian, what working distances were you getting?


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LordV
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Jan 25, 2015 00:55 as a reply to  @ Lester Wareham's post |  #3

Thanks Lester :)
I only measured the WD at 5:1 which was 25mm.
Brian V.


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Lester ­ Wareham
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Jan 25, 2015 01:48 as a reply to  @ LordV's post |  #4

Sounds a bit cosy. :)


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orionmystery
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Jan 25, 2015 03:33 |  #5

Really cool! Thanks for sharing this, Brian. Was expecting like slightly more than 3:1 max with this setup! Did you have a chance to look at the IQ?


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Jan 25, 2015 04:08 |  #6

Thanks for the info Brian!

You know me: What I'd like to see is a comparison between the kit lens at max mag and the MP-E at max with the Fstop at 11 and 16. I'd expect the MP-E to be sharper, but stranger things have happened.


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Jan 25, 2015 04:10 |  #7

Lester Wareham wrote in post #17398838 (external link)
Sounds a bit cosy. :)

Yup, the MP-E at 5x has a working distance of 40mm. But I don't see than as being a big issue when my MT-24EX flash heads are even closer to the subject than the lens.


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LordV
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Post edited over 3 years ago by LordV.
     
Jan 25, 2015 05:48 |  #8

Thanks for the comments Kurt and John.

No direct IQ comparison but the kit lens was noticeably worse than the MPE-65. Using a reversed 28-75mm Tamron zoom gave better IQ than the kit lens.
Having said that the reversed kit lens with the adapter does make a very cheap zoom macro lens which is very useable.

Brian V.


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Lester ­ Wareham
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Jan 25, 2015 06:22 |  #9

If you play with it a bit more it would be interesting to see working distance as a function of magnification.


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Jan 25, 2015 06:48 |  #10

LordV wrote in post #17399036 (external link)
Thanks for the comments Kurt and John.

No direct IQ comparison but the kit lens was noticeably worse than the MPE-65. Using a reversed 28-75mm Tamron zoom gave better IQ than the kit lens.
Having said that the reversed kit lens with the adapter does make a very cheap zoom macro lens which is very useable.

Brian V.

Thanks, Brian. Did you happen to measure the magnification for the 28-75?

I guess using a Tamron 17-50 will give really good result.


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Jan 25, 2015 07:19 |  #11

orionmystery wrote in post #17399120 (external link)
Thanks, Brian. Did you happen to measure the magnification for the 28-75?

I guess using a Tamron 17-50 will give really good result.

Kurt - yes did measure the mag range with the Tamron 28-75. About 1.2:1 to 3.2:1
See ruler and other shots below

Brian V.

IMAGE: https://farm8.staticflickr.com/7379/15730491184_31850e5bf8_o.jpg
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IMAGE: https://farm9.staticflickr.com/8640/15730491264_1bf39d788a_o.jpg
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IMAGE: https://farm8.staticflickr.com/7460/15730491334_aedd7153b7_o.jpg
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IMAGE: https://farm8.staticflickr.com/7285/15730491344_80846c8cf6_o.jpg
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IMAGE: https://farm9.staticflickr.com/8637/15730491464_1d0801b886_o.jpg
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IMAGE: https://farm8.staticflickr.com/7455/15730491584_2a62e5557e_o.jpg
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Jan 25, 2015 07:47 |  #12

Thanks for the follow up Brian!

Seems like a good alternative for those times when you want to take a macro rig with you but you want to keep the weight down.


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LordV
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Post edited over 3 years ago by LordV.
     
Jan 25, 2015 09:37 |  #13

Lester Wareham wrote in post #17399076 (external link)
If you play with it a bit more it would be interesting to see working distance as a function of magnification.


Lester some more MFDs in front of the coupler for the kit lens 18-55mm

0.8:1 10cm, 1.9:1 4.0 cm, 2.5:1 3.5cm, 5:1 2.5cm

Brian V.


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Feb 04, 2015 02:26 |  #14

Hi Brian,

I have been pointed to this post by Kurt as I have previously used an reverse auto adapter (returned);

http://srb-photographic.co.uk …reversing-ring-1155-c.asp (external link)

However the coiled cable is very short and I found it pulled on the 18-55mm when using various stages of focal lengths and focus range.

Does the Meike have the same issue of introducing more lens creep? Or is this something that reduces when used enough e.g. the flex relaxes.

Something else with the adapter I had was light bounce which from your images above doesn't seem to suggest that this issue comes up with the Meike but can you confirm.

Many Thanks in Advance,

Bryn


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itsallart
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Feb 04, 2015 10:55 |  #15

I got the tubes too and not every lens talks to them. My Canon EF 70-200 f4/L IS USM gives me an error message, can't use the tubes with it. Why?
They seem to work fine with my primes.


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Playing with a Meike MK-C-UP multifunctional extension tube
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