Canon EF 25II Tube-allonge high-performing Hardware.

Does the job without pb You probably know if you are interested in this product, but just in case, the ring-extension is just an empty tube (without optic) disposed between the housing and the lens. By increasing the circulation, it decreases the minimum distance of focusing of a lens, and therefore s approaching, one increases the magnification (the ratio of the size of the subject on the sensor plane and its actual size). If you plan to use it with other goals, be careful, it is not suitable for use with focal lengths less than 24 mm because the distance of minimum focus becomes void (one-touch). J uses this extension tube with the Canon EF 100mm f/2.8 L Macro IS USM. The result is really excellent, it is necessary to apply a factor of +1/3HE to +2/3 ev to compensate for the darkening caused by the tube however. I also bought the extension tube for canon EF 12II (j am very happy about it too) and you can use the 2 at the same time to further increase the magnification. A tripod is essential in my opinion as soon as you start to add one or two tubes lying on the 100mm. Attention, however, the larger the print, the larger the depth of field decreases... so before you start, It is necessary to frequently check the sharpness -> not easy on a moving subject... Another important point FOR FRAMING (size of subject on your sensor) the depth of field does not depend on the focal length used and the quality of your camera (sensor accuracy) - it depends only of the opening. For example, by opening it up to 2.8 on my 5D Mark III, I have a depth-of-field of approximately 0.1 mm (a tenth of a millimeter !!). To increase the depth of field, it is thus necessary to close the diaphragm, but it reduces the brightness and therefore it makes the use of flash is almost mandatory except in strong light directly on your subject. for example, by closing at 32, I have a depth-of-field of approximately 1.3 mm... not much... If your subject is not moving of course you can compensate by making a longer pause, and in the light of the day. In short - if the macro begins to be of interest to you, provide a budget for the rest of the equipment... and it is for this reason that I only give 4 stars because Canon is abusing a little on the price for an item without optics... good But the construction is neat and robust, your goal is well attached and fixed to the housing even if you stack two. so you can pay for peace of mind and the guarantee that the electrical signals are transmitted between the housing and the lens - so you keep the autofocus (but good in the end is often used in the manual to get the focus where it wants) but it is useful for the calculation of the exposure. the blur of depth of field allows you to exploit your artistic talents, but if you want to sharpness on more than a millimeter, explore the stacking (I let you search on the internet) and c is quite fabulous and the quality of what we can get. you will then need to buy a rail and put a little more spending :-) Canon EF 25II Tube-allonge
The top of the top! This extension tube to pair with the canon lens 100mmf/2.8 USM is simply amazing!!!! I don't regret at all my purchase and my photos are more conclusive...If the coalition in budget tracking following toy a must for crazy marco!!!
Long live macro hd video With this small extension fixed on my 550d I can shoot in hd of beautiful macro image and also for the photo. a lil usefull tool especially for the price. Comes with a small bag in soft leather...
Extension ring Canon Canon EF 25II Tube-allonge Device perfectly suitable,simple to use, excellent finish (Canon, transmit all of the automation, I work with a EOS 600D), of course c is quite expensive, as all Canon material, but the quality is at this price it seems. It would obviously have been more interesting to have two rings of different thicknesses, but in the immediate, it is possible to exceed without complications the 1:1 ratio.
To be effective, but attention Here is the opinion of a novice, the experts criticize may be, but they are the experts! Of course, an extension tube is an extension tube. It enables to reduce the distance of developed and, therefore, to increase the magnification. It works, but pay attention, the more the focal of the lens is, the less c is effective and the greater the depth of field is reduced. The latter has the advantage of compatibility Canon, and yet, the af n is efficient on the long focal lengths. Prefer the good old manual focus, c is more Difficult to use on the Canon 17-40 f4 L USM lens purchased at the same time, more easily usable with the Canon 24-105 f4 L IS USM, but with a lot of light and a foot. Better than the up, it is still far from the performance of a macro lens. The choice between these three options depends on your budget and frequency of use.
Extension ring length of 25 mm Used in automatic between EF 100 mm Macro IS L and EOS 70D . Approximation very strong in macro, need often of the foot and remote control , viewing is on a tablet, or PDA .
Quality Canon Nothing to complain about, the quality Canon has to be paid even if the price is lower than what it should be. Having changed the format, I preferred to buy the 2 tubes to replace my Canon EFS 60mm f2,8 macro usm, not the using that rarely.
Very good product signed canon This tube is just magic, frankly, me personally I didn't find better for the same extension rings to the side of the tube it does not compare canon there is nothing to make you pay can be the brand but the quality is at the appointment.
Option for optical very useful Accessory for the focus distance, counsellor d used with the appropriate goals.
High-performing hardware. Good price/quality ratio, Results corresponding to those announced. Great photos macro. Very good results, especially when it is coupled with the extension tube EF12 II .
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