Buy EF12 vacuum tubes online, in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amplifier. The EF12 is a pentode designed for RF or IF amplification at HF or MF. The wide metal tube envelope is 36 mm in diameter, and excluding the footless base . I found one blurry schematic for use with an EF12 tube, of which I have a a cleaner/readable copy of the EF12 schematic, validation that this.

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Rated 5 out of 5 by Anonymous from Having fun Photography is a hobby.

Rated 4 out of 5 by Edward T. Build quality is excellent and product has a very solid feel. Did you have a chance to compare it in a ‘shoodoud ziduation’? MagnetoSound on January 05, See any fube on this page? However, the EF12 is or at least was at one time the “2nd place” tube of choice for Wagner and Grosser, according to what I read on the internet.

Rated 5 out of 5 by Anonymous from Typically good Canon product Very useful addition if you don’t wish to buy a macro lens. No flex noted between lens and camera body.

Thanks again for the links above. In Stock Update Location close. Rated 5 out of 5 by Anonymous from Great on the Canon lens I bought this and the EF 12 II for use in photographing butterflies and am extremely happy with the results.

Next day, trying out the extension tube with the EF-SI found that a focused image was impossible to achieve optically with the zoom set at less than approximately 50 mm, but at the longer end of the zoom range there was no problem in getting a perfectly focused macro image. I like to shoot eff12 but at this point don’t want to spend the money on a dedicated macro lens so got this extension tube and have had it for a week.


I took seriously his recommendation and I am satisfied with the results. It also allows autofocus to function normally. Enter new zip code to refresh estimated delivery time.

I have a Canon 7D. Rated 5 out of 5 by Eytan Wulfsohn from Great addition to your lens collection I do a lot of wildlife photography and often come across insects and flowers that present excellent photographic opportunities.

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Yes, the guys at Flea decribed the ef12 as being a litlle less agressive than the ef14 so more hi-fi is probably the best definition. No matter how much I varied my distance to the subject or adjusted the manual focusing ring the image remained completely ef1 of focus. I do wish that the tubes were slightly less expensive Canon or Kenko. Which tube is that again?

For further details see delivery estimates in cart. May 10, It does not work with auto focus. Biasrocks on January 05, I use it with the nifty fifty and my mm kit lens, both are tubf copies. Sending along a photo with and without the extension tube.

EF12 @ The Valve Museum

I preferred the EF12 slightly. Great forum you have here. Light metering works well but autofocus needs to be turned off. Klaus runs a pretty tight ship, and is pretty passionate about having the discourse be ‘meaningful.

Insight into “Uinspired” with EF12 tube?

On the included comprehensive spec sheet this lens was not listed and I assumed it was because it was a fairly new lens. I don’t believe, however, that the tube can or will replace a good macro lens. You even did the badge?? Very likely it’s also JAN like in Max’s kit, and the resistor looks like 3. Extension tubes are thus commonly used for macro photography and sometimes for closeup portraits.


Be the first to review this item. Using the extension tube to shorten the minimum focal distance permits exciting alternatives to the usual way of viewing the object. Hi there, For what i know of the ef12 in a u47, it has a reduced sensitivity and diferent heaters voltage.

Ef1 this type photography is tripod and manual focus recommended, I use the combination outside mostly off hand and automatic with no problem. So the EF 12 II extension tube has its limitations. On the ‘to do in ‘ list.

EF14M replacement tube

Use it mainly with my nifty fifty lens and have tried it with my mm f4 lens. So I’m not a total “rookie” but I do view this project as a “probable learning experience. Ribbon microphone services http: I first tried out this macro extension tube on an EF-S ultra-wide zoom. But not a hube. I found this thread which has some good info. This extension tube is solidly built and does not introduce any flex between the camera body and lens.

July 07, ,