Canon Life-Size converter on 100macro

All around i read about the effect of the life size convertor on the

50/2.5 macro lens for 1/1 magnification but what effect will i get

with him on lens other then that one if any? let say with the

100/2.8 macro?

The Life-size converter is dedicated to the 50/2.5 macro lens and is not supposed to work on other lenses. I was told that it wouldn?t fit on other lenses at all, it might be physically incompatible. Haven?t tryed myself. I do have the 50/2.5 but not the converter.

<em> This optional accessory is designed to work strictly with the EF 50mm f/2.5 Compact Macro lens.</em>

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<a href="http://consumer.usa.canon.com/ir/controller?act=ModelDetailAct&fcategoryid=155&modelid=8121">http://consumer.usa.canon.com/ir/controller?act=ModelDetailAct&fcategoryid=155&modelid=8121

</a>

I don't know the precise magnification or maximum distance, but PN member Robin Sibson has been kind enough to post considerable hard-to-find and unpublished information regarding the LSC in his posts, including <a href="http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=0051Ca">here</a>, which notes that the LSC is physically compatible with other lenses. (Robin, if you read this, please consider consolidating your posts into a little LSC FAQ.)

I use my LSC with other lenses, and it works just fine. I've tested with 50/1.8, 50/1.4, 85/1.8 and the 100/2.8 USM. I even put it on my Tamron 28-75/2.8 once. I don't know the exact magnification, but things get a lot bigger :) Also, sharpness has been fine, at least from my judgement, with all the lenses I mentioned.

I'm not sure why you'd want to, the 100mm f/2.8 is 1:1 anyway (i.e. it is already life-size).

The reason why you would use it is that it will enable you to achieve greater than 1:1 magnification. :o) Given it is a combination of a 8.3mm extension tube and a 1.4x extender, you get the increased working distance of a 140mm, together with greater magnification.

So, since I already have the 50mm macro lens and the 1.4x II TC, can I simply buy an extension tube and mount these components in the proper order to achieve a 1:1 macro lens?

 

If so, which Canon extension tube would work? The protrusion of the front element of the 1.4x II TC would be an issue if the tube isn't deep/long enough.