Question about Canon EF 100mm f/2.8 Lens

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I have a canon 100mm EF macro lens with a loose rear element section. How do I solve it?

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You can TRY to see if the screws are loose on the back of the camera around the rear element.  Sometimes they look flush but need a couple of gentle turns to bring everything where it should be.  If possible you should use a JIS (Japanese Industrial Standard) Phillips screwdriver so you don't strip the screwdriver head.  Don't use too much force - these are precision instruments and only need a certain mechanical tightness - too much can cause harm.
Unfortunately, if it's not those rear end screws, you'll have to send it in to Canon.  Fortunately Canon is very good about repairing lenses, even if they are slightly out of warranty.
Good luck

Posted on May 17, 2009

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Posted on Jan 02, 2017

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I cant seem to get the lens to fous on anything within 3 feet when in macro.. am i doing something wrong?


Actually you are doing really well cause the Tamron specifications for that lens is 1.5m translated into real numbers that's 4.92 feet. If you want some serious macro let me suggest the Canon 100mm F2.5 Macro lens it's not all that bad for price unless you get the IS version then it's out of the park well sort of. Most of my macro work is done on a tripod anyway so the IS is a waist for me.

Here is a review on that lens.

http://www.fredmiranda.com/reviews/showproduct.php?product=47

Also is you are using the APS size sensor there is a focal factor of 1.6 so the 100mm lens just grew to 180mm and twice as fast as your Tamron. Cheers

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1 Answer

I have a Canon 100mm macro lens used on a Canon EOS 40D Camera. The problem I have is that the images produced seem to be not pin sharp, even when using a tripod and the mirror lockup function on the...


It seems that you have either a faulty lens or one which is performing outside of the minimum quality standards. You have clearly done everything possible to try and eliminate all other causes. Looking at the firmware updates for your camera, none of them mention an issue involving your lens but you may wish to ensure that you have the latest firmware anyway.

All you can do is to contact Canon customer care to request that the lens is exchanged.

Sep 07, 2010 | Canon 100mm f/2.8 Macro USM EF Lens

1 Answer

Is there a small booket on my Canon Zoom Lens


I had a similar situation with a 100mm macro. I used the Canaon US site and comunicated via the internet and they sent me a pdf of the manual. "Service and support, support by email."
http://www.usa.canon.com/cusa/consumer/products/cameras/ef_lens_lineup/ef_24_105mm_f_4l_is_usm#ServiceAndSupport

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1 Answer

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I thought mine was broken but i cleaned off the copper tips on the bottom with a clean eraser very gently, and afterwards i put on the lens and it worked. I would give that a try if you have not already

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1 Answer

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you should be able to use that lens with it. As long as it attaches to the SLR body ok. The thing to be aware of is with better technology in the newer camera you may have AF issues with that particular lens.

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Canon EF 50mm 2.5 macro autofocus broken. buy new or have it fixed ?? can u advice ?


Given the cost of this lens new, it's worth asking a repairer for an estimate. Protech Photographic, Uckfield may be able to help

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Would this lens work with my digital canon xs?Sigma 70-300mm f/4-5.6 Macro AF zoom lens for Canon EF film cameras


yes ef stands for electric focus which is what your camera mounting should be check your mounting to make sure its EF and if it is go for it. also the mounting type might be in your hand book

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1 Answer

Would a canon 100mm f2.8 be a lense to use to shot a basketball game sitting under the goal?


Well it could be used but you may find the auto focus to be too slow and the aperture of f2.8 a bit dark for indoor sports. That lens is best used in the role it was intended — macro photography. Take a look at the 85mm f1.8 USM or the 100 f2 USM. They are reasonably priced and offer greater AF speed and low light ability.

Hope this helps

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1 Answer

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By the way are these RAW images? What type of lense are you actually using, check this

EOS-1Ds Mark III EOS-1D Mark III EOS-1D Mark II N
EOS-1Ds Mark II EOS-1D Mark II EOS-1Ds
EOS-1D EOS 5D EOS 40D
EOS 30D EOS DIGITAL REBEL XSi/EOS 450D EOS DIGITAL REBEL XTi/EOS 400D DIGITAL
Compatible Lenses
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EF 20mm f/2.8 USM EF 28-200mm f/3.5-5.6
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EF 50mm f/1.4 USM EF 70-200mm f/2.8L IS USM
EF 85mm f/1.2L USM EF 70-200mm f/4L IS USM
EF 85mm f/1.2L II USM EF 100-400mm f/4.5-5.6L IS USM
EF 100mm f/2.8 Macro USM EF-S 60mm f/2.8 Macro USM
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EF 24-70mm f/2.8L USM EF-S 55-250mm f/4-5.6 IS
EF 24-105mm f/4L IS USM -

Jun 30, 2008 | Canon Cameras

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