Sigma 10-20mm 3.5 wide angle lens.
Sep 2, 2019 18:55:43 #
How does the Tokina 11-16mm f/2.8 AT-X116 Pro DX II Digital Zoom Lens (AF-S Motor) compare to the sigma lens
Sep 2, 2019 20:33:53 #
travisdeland wrote:
NO-It is not. This is a "DC" series lens that is designed for a crop sensor camera.
Ah, but it is. The focal length doesn't change. A 10-20 mm is a 10-20 mm no matter what mount for what sensor size. The "crop factor" still applies.
Sep 2, 2019 21:11:08 #
you are wrong there-the crop factor is developed to explain the "apparent magnification" that occurs when a full frame image is projected on a crop frame frame sensor, which is "cropped" because the image is larger than the sensor. A Sigma DC, Canon EF-S, and other manufacturer "crop lenses", only project an image that is sized for the sensor-this is why they are called "crop sensor lenses".
Sep 2, 2019 21:14:08 #
this is the reason that Canon has a way to prevent a crop lens(EF-S) from being mounted to a full frame(EF) body-the image projected from a crop lens will not cover a full frame sensor.
Sep 2, 2019 21:25:45 #
travisdeland wrote:
you are wrong there-the crop factor is developed to explain the "apparent magnification" that occurs when a full frame image is projected on a crop frame frame sensor, which is "cropped" because the image is larger than the sensor. A Sigma DC, Canon EF-S, and other manufacturer "crop lenses", only project an image that is sized for the sensor-this is why they are called "crop sensor lenses".
The Angle of View is the length in mm x 1.6 for Canon crop sensor bodies so the 10-20 has the same angle of view as a 16-32 lens on a FF body.
Sep 2, 2019 22:03:56 #
travisdeland wrote:
this is the reason that Canon has a way to prevent a crop lens(EF-S) from being mounted to a full frame(EF) body-the image projected from a crop lens will not cover a full frame sensor.
No, it is because some of the EF-S lenses project into the camera body and can interfere with the mirror causing damage to both. All the third party lenses for EF-S bodies use the EF mount and are made so nothing projects that far but the smaller image circle they throw will cause vignetting on the FF sensor.
Attached are a series of shots done with a Tamron 10-24 made for EF-S mounted on a 6D.
#1 10 mm on 6D with hood
#2 10 mm on 6D no hood
#3 13 mm on 6D with hood
#4 13 mm on 6D no hood, slight vignette
#5 14 mm on 7DII crop sensor
#6 14 mm on 6D with hood usable
From there to 24 mm the lens was usable on the 6D FF. The 14 mm shots were on a different day from the same spot looking out the door of our family room because I accidentally deleted those shots and did a re-shoot the next day.
10 mm w/hood
(Download)
10 mm no hood
(Download)
13 mm w/hood
(Download)
13 mm no hood
(Download)
14 mm on 7DII
(Download)
14 mm on 6D-usable
(Download)
Sep 2, 2019 23:49:07 #
Sep 3, 2019 07:40:32 #
I have this lens. I purchased it used off a friend that I know.When I purchased this lens i gave $200 used, but in New condition. The camera that I used it on was a nikon D3200 it works perfidy with this camera. The problem is I resently purchased a D5300. The lens works on the D5300 works only in manual only.
It's probably a firmware issue.and I don't know actually how old the lens is. So I go ahead and use it anyway in manual mode.
It's a great lens,
I don't use it all the time but when I do it's always there.
It's probably a firmware issue.and I don't know actually how old the lens is. So I go ahead and use it anyway in manual mode.
It's a great lens,
I don't use it all the time but when I do it's always there.
Sep 6, 2019 09:58:17 #
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