Canon EF-S 17-85MM F/4-5.6 IS USM prevents features from working on 40D
Tried to take photos today with Canon EF-S 17-85MM F/4-5.6 IS USM lens on Canon 40D, aperture reads 00, can't use aperture priority mode as won't change from 00, displays 00 in all modes including the Fully Auto mode, cannot change AF modes nor drive modes while this lens is on. I used another lens and it works as it should. I will try cleaning the contacts but what else could it be? Only 6 months old.
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Re: Canon EF-S 17-85MM F/4-5.6 IS USM prevents features...
Something sounds strange about this. aperture 00 is an invalid aperture value. stands to reason if that is the case the camera would complain about it. via error code. being that its only six mos. old i would give canon a ring.
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hi i am sagha a camera repairer from mumbai, i have gone through such problems much oftenly,in your case i think it is the internal problem with the flex board inside the lens which is multitwisted on metal plate after prolonged use becomes stiff & brittle and creates hairline cracks on the pcb which in turn breaks the tiny tracks & leads to malfunction at 135 mm.
You are correct in thinking that it should be possible to set the aperture wider than f/5.6 at the wide end of the zoom range. My best guess is that the lens is defective. I'd suggest returning it for a replacement.
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 EF 14mm f/2.8L USM EF 28-70mm f/2.8L USM EF 14mm f/2.8L II USM EF 28-135mm f/3.5-5.6 IS USM EF 20mm f/2.8 USM EF 28-200mm f/3.5-5.6 EF 24mm f/1.4L USM EF 28-200mm f/3.5-5.6 USM EF 28mm f/1.8 USM EF 28-300mm f/3.5-5.6L IS USM EF 35mm f/1.4L USM EF 70-200mm f/2.8L USM EF 50mm f/1.2L USM EF 70-200mm f/4L USM 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 EF 135mm f/2L USM EF-S 10-22mm f/3.5-4.5 USM EF 180mm f/3.5L Macro USM EF-S 17-55mm f/2.8 IS USM EF 200mm f/2.8L USM EF-S 17-85mm f/4-5.6 USM EF 200mm f/2.8L II USM EF-S 18-55mm f/3.5-5.6 EF 16-35mm f/2.8L USM EF-S 18-55mm f/3.5-5.6 II EF 16-35mm f/2.8L II USM EF-S 18-55mm f/3.5-5.6 USM EF 17-35mm f/2.8L USM EF-S 18-55mm f/3.5-5.6 II USM EF 17-40mm f/4L USM EF-S 18-55mm f/3.5-5.6 IS EF 24-70mm f/2.8L USM EF-S 55-250mm f/4-5.6 IS EF 24-105mm f/4L IS USM -