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06-11-2014, 07:36 AM   #1
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645 Extension Tubes

Does anyone here have any experience with the 645 extension tubes? I have the 120mm macro already, so does it make sense to also get the extension tubes? I'm thinking about shooting some extra small objects (wild blueberries and dandelion seeds are what come immediately to mind).


Can anyone offer experience on the #1,#2,#3 set versus the helicoid? I'm assuming the helicoid just allows you to "zoom" without having to switch out the extension tubes.


Any advice is appreciated, thanks!

06-11-2014, 08:12 AM   #2
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Ryan:

I have the tubes. They work well and are extremely well made and allow auto aperture and wide-open metering. If you want to go beyond 1:1, the tubes are indispensable (keep in mind DOF becomes very shallow).
There is so much focus length in the lens itself that I don't think the helicoid would be of much advantage. I don't have the 645 helicoid, but I do have the 67 version which does not allow automatic aperture or wide open metering; I would assume the 645 version has the same limitations.
06-11-2014, 08:38 AM   #3
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I've ended up with both the 120 Macro AND the tubes AND the helicoid tube. Why? I wasn't sure what I'd be able to find so when a possibility came up I bought. The helicoid doesn't allow auto aperture, etc. Isn't that macro a marvel? You might want to look into a focus rail for macro shooting, makes life much, much easier. Adorama has one for about $90 which is up to the weight of the 645 plus the 120.
06-11-2014, 08:47 AM   #4
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I don't have the 120 but do have the tubes. Yep, they are well made and work just fine. I don't do a lot of close work with my 645 (film) though. I do have a 6x7 135mm macro and a converter to 645 mount if need it. I would also say that if I have a macro lens on any camera, I'm likely to use it much more over tubes, it's just easier for most things. YMMV

06-11-2014, 09:48 AM   #5
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QuoteOriginally posted by grhazelton Quote
I've ended up with both the 120 Macro AND the tubes AND the helicoid tube. Why? I wasn't sure what I'd be able to find so when a possibility came up I bought. The helicoid doesn't allow auto aperture, etc. Isn't that macro a marvel? You might want to look into a focus rail for macro shooting, makes life much, much easier. Adorama has one for about $90 which is up to the weight of the 645 plus the 120.


Thanks for the tip, I'm leaning towards the set of three tubes instead of the helicoid because they cost less and keep auto aperture. I usually use my RRS nodal slide as a macro slide (I think it might even be the same product). Certainly easier than moving the tripod, especially when shooting on uneven terrain.
06-11-2014, 11:05 AM   #6
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I like my helicoid because it keeps me from having to move my tripod. Between the lens helical focusing and the helicoid tube, there is lots of focusing latitude. I sometimes add a #2 tube with the helicoid when more magnification is needed. Yes, auto diaphragm is lost. Actually, the better performing zooms for both the 645 and the 67 do quite well in macro work.
06-11-2014, 01:12 PM   #7
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I just ordered my set of three extension tubes from KEH...should be here in a few days! Thanks for the input everyone!
06-17-2014, 10:54 AM   #8
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great, can't wait to see your results using them.
I am late to the party but I use the tubes, not for macro, but mainly to overcome minimum focusing limits on some of my lenses. I got into a product shoot last summer and simply could not get close enough to the subject to get the shots I wanted. The #1 tube does the trick, especially with my 67 105/2.4 lens.

06-18-2014, 10:07 AM   #9
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Some new macro work:


Ryan Tischer Photography | NEW IMAGES


Ryan Tischer Photography | NEW IMAGES


Ryan Tischer Photography | NEW IMAGES


Ryan Tischer Photography | NEW IMAGES

---------- Post added 06-18-14 at 12:25 PM ----------

The bottom two are a bit older and not shot with the extension tubes, but thought I'd share anyway.
07-19-2014, 02:03 AM   #10
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I've been looking for the Pentax set of tubes and they seem to be very hard to find. Does anyone know if the Mamiya ones (Mamiya 645 Pro Macro Auto Extension Tube Set 1 2 3 s 71 4 | eBay) will keep auto aperture on a 645Z?
07-19-2014, 11:12 AM   #11
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I highly doubt it. You might be better off with a set for the Pentax 67 as they are common. That would work if you had any 67 lenses and the 67 to 645 adapter between the tubes and camera.

There are Helicoid extension tubes available for the 645 on ebay.

Last edited by desertscape; 07-19-2014 at 11:21 AM.
07-20-2014, 11:13 AM   #12
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KEH.com did have some, but maybe I purchased the last set of tubes a few weeks ago! They just redid their website and I can't even seem to find where the lens accessories like those are located...eBay probably still has some 645 ext tubes. They were a little less on eBay when I looked, but came from overseas, so I just bought from KEH instead.
07-20-2014, 11:21 AM   #13
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120 macro with full set of tubes

I took this with full set of extension tubes today with A120 f4, flash light was used and on tripod too



645Z body.

uncrop image. Magnification about 50 percent more that normal 1:1.

marcus
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