Putting a Tamron 18-400 lens on Canon EOS-R: I recently acquired a Canon EOS-R camera and I am still learning about its features. I put my favorite lens, a Tamron 18-400, F 3.5-6.3...

FranC

I recently acquired a Canon EOS-R camera and I am still learning about its features. I put my favorite lens, a Tamron 18-400, F 3.5-6.3 lens, on it using a Canon adapter. When I take a picture, there is a shadow around the edge as seen in the attached picture. Is there a different adapter I should use or is there a setting on the camera that needs to be changed to eliminate it? Thanks.

(Download)

jeep_daddy Loc: Prescott AZ

FranC wrote:

I recently acquired a Canon EOS-R camera and I am still learning about its features. I put my favorite lens, a Tamron 18-400, F 3.5-6.3 lens, on it using a Canon adapter. When I take a picture, there is a shadow around the edge as seen in the attached picture. Is there a different adapter I should use or is there a setting on the camera that needs to be changed to eliminate it? Thanks.

I believe that lens is designed for an APS-C sensor (crop sensor). So you're going to have that problem with a full frame body using this lens.

Bultaco Loc: Aiken, SC

No picture?

CHG_CANON Loc: the Windy City

You're using a cropped-sensor lens on a full-frame camera. The EOS-R and adapter can 'sense' the EF-S lenses and properly crop the image down to the smaller image circle created by this type of lens. For third-party lenses, this cropping is not automatic. I believe you need to visit page 80 of your EOS R manual for the settings to adjust.

Walt B

If you want the benefit of full frame, check out the Canon 24-240 which lists for $899. I switched from a Tamron 28-300 full frame. This lens is much better. Go to the CanonUSA website and see if they have a refurbished available. My son just bought one and saved over $100. You can't tell the difference from a new one and has the same warranty. If you need an even longer reach, check out the new 600mm or 800mm lenses. I have the 800mm and it works great even hand held.

Walt B

kenArchi Loc: Seal Beach, CA

It's accuretly cropping the full frame to APS-C size.

FranC

CHG CANON - That was the problem. I checked the user manual and on page 72 (I hadn't gotten that far yet), it showed how to change the Aspect Ratio. When I did, the problem was solved. Thanks!

PHRubin Loc: Nashville TN USA

Be aware that using a crop lens on a full frame body, the lens cannot fully illuminate the camera sensor, so you get vignetting, loss of the corners as you see in the photo. Going to crop mode on the camera simply crops the resulting image so you don't see those corners, but the result is an image of much fewer pixels and the resulting resolution then the full capability of the camera.

Of course, that resolution was considered top of the line several years ago. The 18-400mm (or even 18-300mm) is a nice "all purpose" zoom range for the camera and is not available in a full frame version.

Architect1776 Loc: In my mind

Walt B wrote:

If you want the benefit of full frame, check out the Canon 24-240 which lists for $899. I switched from a Tamron 28-300 full frame. This lens is much better. Go to the CanonUSA website and see if they have a refurbished available. My son just bought one and saved over $100. You can't tell the difference from a new one and has the same warranty. If you need an even longer reach, check out the new 600mm or 800mm lenses. I have the 800mm and it works great even hand held.

Walt B

Could you do a new thread on this 800mm R lens?
A lot of us would love to hear about your thoughts on it as well as a couple of shots.
It really seems like a good option for us poor people to get a quality Canon 800mm lens.
Thank you.

dalemags

Change your setting from full to cropped at 1:6 and it will go away but you will be cropped down.

SuperflyTNT Loc: Manassas VA

FranC wrote:

CHG CANON - That was the problem. I checked the user manual and on page 72 (I hadn't gotten that far yet), it showed how to change the Aspect Ratio. When I did, the problem was solved. Thanks!

If you don’t change the aspect ratio you can use more of the sensor, just crop in post.

FranC

jeep_daddy wrote:

I believe that lens is designed for an APS-C sensor (crop sensor). So you're going to have that problem with a full frame body using this lens.

I thought that was the problem but I didn't know how to change it. Thanks.

FranC

Bultaco wrote:

No picture?

I pushed "Send" before the picture fully loaded.

FranC

Walt B wrote:

If you want the benefit of full frame, check out the Canon 24-240 which lists for $899. I switched from a Tamron 28-300 full frame. This lens is much better. Go to the CanonUSA website and see if they have a refurbished available. My son just bought one and saved over $100. You can't tell the difference from a new one and has the same warranty. If you need an even longer reach, check out the new 600mm or 800mm lenses. I have the 800mm and it works great even hand held.

Walt B

I'll keep that in mind. Thanks.

FranC

dalemags wrote:

Change your setting from full to cropped at 1:6 and it will go away but you will be cropped down.

That's what I did and it seems to be fine. Thanks.