Extension tube sizes. Extension tubes come in different sizes, for examples Canon offers two sizes, 12mm and 25 mm in length. Other manufacturers offer different lengths, Kenko offers a set of three sizes 12 mm, 20 mm, and 36 mm. Fotodiox offers a set of three sizes 7 mm, 14 mm, and 28 mm. As the length of the tube increases the magnification Comparing Canon Extension Tube EF 25 II vs Dot Line Auto Print Email . Canon Extension Tube EF 25 II . You Pay: $144.95 (456) Add to Cart View Cart. The Canon EF 25 II Extension Tube belongs to the more expensive side of extension tubes, but its magnification power justifies it. It is compatible with EF, EF-S, and TF-S lenses. It is compatible with EF, EF-S, and TF-S lenses.
This spider was shot with Canon EF 70-200mm f/2.8 and a 25mm extension. And even longer lenses, such as this tiny fence lizard shot with a Canon EF 300mm f/2.8 with 36mm extension. In fact, extensions can be very helpful when telephotos minimum focus distance just isn't close enough, as was the case with this little bush **bleep** at its nest
EF 300mm f/4 L non-IS USM + Extension Tube 12 = EF 300mm f/4 L non-IS USM + Extension Tube 25 = EF 100mm f/2 USM + Extension Tube 12 = EF 100mm f/2 USM + Extension Tube 25 = and also, how much light do I loose with the 12 & 25 extension . tubes, are they like the 1.4X and 2X Extenders - 1 and 2 stops . respectivley? Thankyou very much folks. Bellville, Cape Town, 7530. South Africa. sales-bellville@orms.co.za. +27 21 910 1380. Weekdays 9AM to 5PM. Saturdays 9AM to 1PM. Features. The Extension Tube EF 25 is installed between the prime lens and the camera body. It is a simple way to enable close-ups at high magnifications by increasing the distance between the lens and the film plane The general rule of thumb is that the extension tube needs to equal the focal length of the lens to get 1:1. So if the tube WILL fit the 18-55, then you should get slightly more than 1:1 at the short (18mm) end of the lens. The 35 lens would require 35mm extension tubes to achieve 1:1. Reply Reply with quote Reply to thread Complain.
The point is, with 25mm you will not get much extra magnification on a 100mm lens. And the Canon tubes are quite expensive. The Kenko (EF-S version if you have crop) set is a good set and gives you a lot more possibilities, and when stacked (68mm), much better extra magnification. -- hide signature --.

The Auto Extension Tube Set for Canon EF/EF-S Mounts and Lenses from Vello consists of 12mm, 20mm, and 36mm tubes with durable metal lens mounts. The extension tubes reduce the minimum focusing distance on your lens and enable you to capture the fine details of an insect or the inside of a flower.

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    • canon ef 25 extension tube