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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 Great product Extension tubes are a great alternative to costlier macro lenses and less expensive close-up lenses.

EF14M replacement tube

I have a load but have never really tested them properly in a mic. 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 tubd 50 mm, but at the longer end of the zoom range there was no problem in getting a perfectly focused macro image. 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.

Gus Member NJ Posts: Biasrocks on January 05, There are other possible lens combinations but these two give me a shot at something less than macro. Rated 5 out of 5 by Anonymous from Having fun Photography is a hobby. It also allows autofocus to function normally. I put together two of the “Royer mod” MXLs and they came out really really nice.


Other than that, the item is a very well designed and constructed Canon accessory that works flawlessly. I do wish that the gube were slightly less expensive Canon or Kenko. I’m a member over there as well.

Great forum you have here. I got a pretty good buy on it, NOS, and I’ve been wanting to build a mic anyway. Did you have a chance to compare it in a ‘shoodoud ziduation’?

It’s the only part I have. I certainly cannot afford a real VF Started by chefducuisine The Lab. If tue are thinking about getting into macro photography or just don’t have the need for a macro dedicated lens, then this may be a great product for you to try.

Peluso Microphone Grade Vacuum Tubes

It does not work with auto focus. The EF 12 II meets all my current macro demands. In Stock Update Location close. See any errors on this page?

Er12 Expedited Shipping fyrvctsttx. No matter how much I varied my distance to the subject or adjusted the manual focusing ring the image remained completely out of focus. Ribbon microphone services http: You even did the badge??

January 05, May 10, All auto exposure features on the lens coupled to the extension tube work normally, and focusing is best done through varying your distance to the subject and fine focusing ef1. On the included comprehensive spec sheet this lens was not listed and I assumed it was because it was a fairly new lens.


I preferred the EF12 slightly.

June 27, I’ve done a fair amount of reading, and everyone has a passionate opinion about tubes to use in “U47 Inspired” mics. Light metering works well but autofocus needs to be turned off. I don’t believe, however, that the tube can or will ef112 a good macro lens. The result of using extension tubes is that the distance from the back of the lens to the film surface is longer, which means you can take photographs at shorter distances to the subject.

No flex noted between lens and camera body.

Use it mainly with my nifty fifty lens and have tried it with my mm f4 lens. Enter new zip code to refresh estimated delivery time.

Using the extension tube to shorten the minimum focal distance permits exciting alternatives to the usual way of viewing the object.