Telescopic Extension Tube for EOS

<p>Olympus has one.<br>

Does anyone make it for Canon?<br>

Thanks ...</p>

<p>Yes, there is. This one is from Bresser (Germany). Bresser is a manufacturer of telescopes and offers many add-on's.<br>

Left is the Canon adapter ring which is the connection between an EOS camera en the tube, on the right is the tube you mount on the telescope.<br>

Kind regards,<br>

Jan</p>

 

<p>Yes, there is. This one is from Bresser (Germany). Bresser is a manufacturer of telescopes and offers many add-on's.<br>

Left is the Canon adapter ring which is the connection between an EOS camera en the tube, on the right is the tube you mount on the telescope.<br>

Kind regards,<br>

Jan</p>

 

<p>Yes, there is. This one is from Bresser (Germany). Bresser is a manufacturer of telescopes and offers many add-on's.<br>

Left is the Canon adapter ring which is the connection between an EOS camera and the tube, on the right is the tube you mount on the telescope.<br>

Kind regards,<br>

Jan</p>

 

<p>Thanks Jan but I wasn't thinking of a microscope attachment but rather something between my EOS 40D and my EOS lenses.</p>

<p>I think you are thinking of an extending extension tube for macro work?<br>

I only know of fixed length tubes, the Canon ones come in 12mm and 25mm lengths and are better made but more expensive than the popular Kenko ones available in a stack of 36, 20 and 12mm.<br>

However, I would recommend getting a real macro lens such as the 100mm f2.8 macro usm giving up to life size unaided and 2:1 with a stack of ordinary tubes of about 60mm. For normal photography the 100mm doubles as a very sharp prime.<br>

For higher magnifications the MP-E 65mm gives magnifications of life size to 5:1 unaided but start with the 100mm if you are new to macro.<br>

Some info on Canon macro kit <a href="http://www.zen20934.zen.co.uk/photography/Macro_Equipment.htm">http://www.zen20934.zen.co.uk/photography/Macro_Equipment.htm</a></p>

 

<p>Hi,</p>

<p>It sounds as if you are looking for some sort of variable macro extension.</p>

<p>In many systems there are macro bellows. Also, there are helicoids. Bellows give higher magnification and a wider range of potential adjustment. Helicoids are more limited, but a lot more compact and less susceptible to damage.</p>

<p>I think there might be a Novoflex bellows made for Canon EF mount.</p>

<p>I don't know of any helicoid at all.</p>

<p>The reason Canon doesn't offer a bellows is the electronic communication between lens and camera. This makes it difficult to design and built a bellows that will do the job... most specifically control the aperture on the lens.</p>

<p>Instead of a bellows, Canon offers the MP-E 65mm lens, which gives bellows-like levels of magnification (1:1 to 5:1).</p>

<p>Now, there are a number of macro extension tubes available for Canon. These are non-variable, but if, for example, you were to get one of the sets of three, you would have 7 different possible combinations, adding up to 7 different amounts of extension. There are Kenko and Adorama (Flashpoint) extension tube sets available.The Kenko sells for about $150 US the last I looked, and the Flashpoint is a little under $100.</p>

<p>If you consider these and are wanting to use them with any EF-S lenses, double check that the tubes are EF-S compatible. Canon recently updated their 25mm and 12mm tubes (only sold individually) to Versions II, which can accomodate EF-S lenses. Note: it's possible to modify older, non-EF-S tubes so they will work. Google for info, if you want to try that.</p>

<p>I do not recommend you buy the cheaper macro tube sets off eBay. All these I've seen are "dumb tubes" that do not maintain electronic communication between camera and lens. You lose AF and, more importantly, aperture control. AF is no biggie, macro shooting is often easier without it. But the aperture control is important. There's a kluge to work around this, but it's fiddly and a bit time-consuming, and for just a few more dollars can be avoided entirely.</p>

<p>I'm not clear either about what you mean by a " Telescopic Extension Tube" "between my EOS 40D and my EOS lenses". Any <a href="http://www.the-digital-picture.com/Reviews/Canon-EF-25mm-Extension-Tube-II-Review.aspx">Canon extension tube</a> will pretty much work with any lens, no matter what its focal length.<br>

Or do you mean a "<a href="http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&fcategoryid=216&modelid=7462">teleconverter</a> " that makes the lens have a longer focal length?</p>

<h1><br /></h1>

<p>Whoops! I clicked to send the message too fast....</p>

<p>I meant to add that extension tubes can be used with a wide variety of lenses. Basically the longer the focal length of the lens, the more extension you need to approach true macro magnifications such as half life size (1:2) and beyond.</p>

<p>Also, extension tubes generally work best with prime lenses instead of zooms. I've used them behind lenses from 20mm to 500mm, most often 50mm to 135mm though.</p>

<p>I have used with some zooms. Extensions work quite well with my 70-200/2.8, for example.</p>

<p>Lester compared the Canon and Kenko extensions above. I've got and use both a lot. Frankly, I can't tell the difference between them functionally. I've been told the Kenko are plastic, but am not sure from looking at them next to the Canon, which I know are metal. I've also been told they will "flex" with heavy lenses and cameras, but have used a 36mm between a 500/4 and 30D with battery grip, without any problem. I'm always a little careful using extensions, though, that they latch securely.</p>

<p>The only extension tube for my Canon kit I've ever had any trouble with was actually one of my Canon brand, a 25mm. That was my own fault, though. I disassembled it to see if it could be customized easily for a specific purpose (it couldn't) and was not careful enough reinstalling the electrical contact springs inside. I caused a short and got error messages with it until I fixed my mistake... D'oh!</p>

<p>Finally, using a non-macro lens with tubes for close work, with many lenses you will begin to see some light falloff in the corners and perhaps some softness. This is because these are not flat field lenses, the way many macro lenses are. It can't be avoided, but might be possible to correct a bit in Photoshop, or might even add to the image.</p>

 

<p>Thanks for all the input. I did mean Extension Tube, not Tele-Converter. Something like what Olympus have as in ...<br>

<a href="http://www.alanwood.net/photography/olympus/telescopic-auto-tube.html">Olympus Telescopic Auto Tube</a></p>

<p>I will point out that the combination of an extension tube and a long lens can produce some pretty spectacular macro effects, especially if the long lens is a "close focus" (often misleadingly labeled <em>macro</em> ) lens.</p>

<p>Google™ Canon and "extension" or search for similar on eBay and you will find a number of tubes. It is nicer to have ones that automatically transmit the electronic information from lens to camera body if you are using AF lenses. For manual lenses, as somebody said, these have no optics in them, so Canon air is no better than anybody elses. ;)</p>

<p>C.G. what lenses do you want to use with the variable tube, and what range of magnification are you looking for? Do you need full coupling, or would a Nikon bellows, a Canon adapter, and some enlarging lenses or Photars and Luminars do a better job?</p>

<p>As Alan pointed out, Novoflex makes a set of mounts (one male, one female) that couple to the Novoflex bellows mount and have a connecting cord between them. This is about $500, a Novoflex bellows another $500. You could also use Novoflex adapters to put the Canon mounts on an Oly variable extension tube, but that seems an awful big expense for such a small range of extension.</p>

<p><img src="http://www.adkinstone.com/images/SG1S5602-19.jpg" alt="" /><br>

<img src="http://www.adkinstone.com/images/SG1S5601-18.jpg" alt="" /></p>

<p>I own this Oly Tube and 80mm f4 bellows lens. With these items inhand all you need is a simple Oly to Eos mount adapter. See My two pix above.</p>

<p>Lindy</p>

<p>Hi Lindy ...</p>

<p>Does the combo work well?</p>

<p>Do you get AE and AF?</p>

<p>Where did you get the Oly/EOS adapter?</p>

<p>Hi Lindy ...</p>

<p>Does the combo work well?</p>

<p>Do you get AE and AF?</p>

<p>Where did you get the Oly/EOS adapter?</p>

<p>Works great. I've only use AV mode on 5D. I thought I'd adapt alot of other things to Eos 5D and acquired them all before hand. Since I obtained my 5d I did add 100mm f2.8 USM macro and 50mm 2.5 macro canon made lenses. They too are exceptional lenses. And Its nice to have full metadata. But still its an option to use Oly macro & normal OM System lenses too. When I got the telescopic tube and tripod adapter and 80mm f4 heilicoil bellows lens it came with the dedicated 80mm f4 close up lens too. Out of all these items the close up lens assessory is the hardest to locate. Cool Stuff, well worth owning if you have full frame dslr or Eos film camera.</p>

<p>If link posts below its my favorite adapter seller out of shanghi. if not go to ebay usa and look up seller jinfinance and do olympus eos search of his offers.</p>

<p><a href="http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110315320686">http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110315320686</a></p>

<p>Canon did make a variable extension tube called "Canon Macrophoto Coupler". It has a high quality and well dampen helicoid extending from 12mm to 25mm. It is designed to reverse Canon's 50mm and 35mm lens. The problem is, it was made in the FD era. Here is a picture with a EF-50/2.5 macro mounted in reverse, yielding 1.8X (1.8:1) magnifications.</p><div></div>

<p>I just realized you asked if oly tube "autofocuses" on eos body.</p>

<p>No it does not. </p>

<p>Even the canon's own MPE 65mm does not autofocus on eos. Autofocus function is not usually a desired option in micro/macro photography so I'm not sure what your option would be to autofocus high magnafication macro captures via Canon Eos cameras.</p>

<p>Lindy</p>