EF & RF Lenses
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Viltrox Stops Selling Canon Lenses

I was interested to see A POST in DPREVIEW to the effect that Canon had told Viltrox to stop selling Canon RF mount lenses.   I went to the lens company's website HERE  and there is no listing for Canon RF lenses and, in fact, none for the EF-M mount...

Canon 100-400 EF 4.5/5.6 not focusing (auto or manual)

I had to tighten a screw on the lens mount of my 100-400 lens because it was loose and not coupling completely with the camera. After tightening it (and now getting a good fit with the camera), the lens is not focusing, either in autofocus or manual ...

Resolved! Need info in a lens previously suggested

I had posted a while back and someone suggested a lens that would be good for general use as baseball games. Couldn't find the post. I checked a file that I keep with printouts of suggestions, etc., but I didn't find anything. I recall the lens was X...

Resolved! Repair Status "Suspended"

I have a lens in the service center under the extended warranty. I checked the status this morning and it is marked as "suspended".Does anyone know what that means? Thanks for any info. 

jblooo by Contributor
  • 4924 Views
  • 2 replies
  • 0 likes

Resolved! RF 100-500mm Manual Focusing with AF Engaged

When using the RF 100-500mm lens (attached to a R5), and the lens switch is in the AF position, can you also use the manual focusing ring to override the auto-focusing?  The focusing ring does have any effect when the lens is switched to AF.  When us...

DEC by Apprentice
  • 4513 Views
  • 3 replies
  • 0 likes

Resolved! Need a suggestion for a macro lens to photograph my jewelry

Hey there! I make jewelry and am looking for a true macro lens for my Canon T6. I've read so many different blogs, posts and I'm more confused than ever. I don't have thousands to spend and a new camera isn't an option at the moment. I've been gettin...

divella by Contributor
  • 13812 Views
  • 14 replies
  • 0 likes

Parameters of the UltraSonic Motor of lens

Hi everyone,  I'm a researcher from the university.  In my study, we ued two SLR lens with Ultrasonic Motor for imaging (f=50/1.4 and f=100/2.8).Recently one reviewer of our paper ask us to compare our new technique with the focusing speed of the USM...

Resolved! 1.4x iii release pin not always engaging

My 1.4x iii release/anti-rotation pin doesn't aways engage and I have to move the lever back and forth a few times on occasion. Not wanting my attached lens/body to fall off, I aways try to check.  I would like to send this in for service, but it loo...

steve_z by Contributor
  • 2344 Views
  • 4 replies
  • 0 likes
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