Tamron 18-400 Just NOT Up To Snuff
Dec 14, 2017 18:11:58 #
Hi - -Ron:
The Kirkland batteries shot is listed as 64mm 1/125 sec at F5 (ISO 4000 - - wow !)
With my lens copy - 50mm didn't look as good as you 64mm shot - - but it was shot at 18mm and f/3.5
Set that up on your lens under lighting conditions where you can also shoot at 1/60th or faster - - post a center crop.
Less than 50mm deteriorated rapidly, and IQ on my copy didn't really sharpen up until about 100mm
Thanks
The Kirkland batteries shot is listed as 64mm 1/125 sec at F5 (ISO 4000 - - wow !)
With my lens copy - 50mm didn't look as good as you 64mm shot - - but it was shot at 18mm and f/3.5
Set that up on your lens under lighting conditions where you can also shoot at 1/60th or faster - - post a center crop.
Less than 50mm deteriorated rapidly, and IQ on my copy didn't really sharpen up until about 100mm
Thanks
Dec 15, 2017 11:43:05 #
Merlin1300 wrote:
Set that up on your lens under lighting conditions where you can also shoot at 1/60th or faster - - post a center crop.
If I read your request correctly: This (hand-held- auto focus) shot is at 50mm (remember this is a crop sensor camera - 7D Mk II), 1/60 sec at f5.0, ISO 400. I used the built in Flash -- this is a walk-around lens (for me) and there would be times when flash is needed but rarely. The image was not processed beyond opening it in Lightroom and converting to JPG for upload. I don't know if I can post the RAW file.
Maybe it could be sharper, I don't know.
Dec 15, 2017 15:23:14 #
mwsilvers
Loc: Central New Jersey
Merlin1300 wrote:
Oh Dear - - I guess I was just hoping for a Miracl... (show quote)
There's something else happening here. Those images from both lenses are ridiculously soft. I would have expected them to be very much sharper.
Dec 15, 2017 22:00:09 #
RonBoyd wrote:
Well - - we're getting closer - - I'm looking for a center crop of a shot set at the widest your lens will go. This would be the 18mm marking on the lens barrel. I realize that will be equivalent to a 28.8 mm lens on a FF 35mm, but even at your reported 50mm - your lens copy is doing MUCH better than mine did. I did Not try the lens on my older 7D Mk-I before sending it back - because the 80D is now my Go-To camera.If I read your request correctly: This (hand-held- auto focus) shot is at 50mm (remember this is a crop sensor camera - 7D Mk II), 1/60 sec at f5.0, ISO 400.
Dec 15, 2017 22:00:40 #
mwsilvers wrote:
Yeah - - Me Too - - THAT is why the lens went backThere's something else happening here. Those images from both lenses are ridiculously soft. I would have expected them to be very much sharper.
Dec 16, 2017 09:08:51 #
Merlin1300 wrote:
Well - - we're getting closer - - I'm looking for a center crop of a shot set at the widest your lens will go. This would be the 18mm marking on the lens barrel.
Okay: Again, These are RAW images with camera set to Program and everything set to Auto (except the 400mm was manual focus -- AF would not lock on) and no Post-processing except conversion to Jpeg. The 400mm shot was as far back as I could get.
This Auto Focus issue (see also earlier post) at 400 mm is somewhat concerning but ambient light was somewhat on the dark side so this will take further investigation.
18 mm - 1/60 sec at f4.0, ISO 400.
400 mm - 1/60 sec at f 6.3, ISO 400
Just out of curiosity, what program did you use to get the Metadata from the earlier images?
Dec 16, 2017 14:55:53 #
PhotoMe - - its a great EXIF viewer program
To do what I want you'll have to shoot in manual mode with zoom set to 18mm, set f/3.5, shutter 1/60 and pick an ISO that works with that
Another option would be to shoot as above in Av mode with aperture set to f/3.5, AutoIso, and set for either ambient light OR use Flash.
To do what I want you'll have to shoot in manual mode with zoom set to 18mm, set f/3.5, shutter 1/60 and pick an ISO that works with that
Another option would be to shoot as above in Av mode with aperture set to f/3.5, AutoIso, and set for either ambient light OR use Flash.
Dec 16, 2017 15:03:10 #
Merlin1300 wrote:
To do what I want you'll have to shoot in manual mode with zoom set to 18mm, set f/3.5, shutter 1/60 and pick an ISO that works with that
I'm confused. Weren't we interested in the focus (sharpness) of the lens at different zoom setting? How would the difference between Apertures f3.5 and f4.0 make a great difference?
Dec 16, 2017 16:36:08 #
RonBoyd wrote:
No. My concern was only at the Wide end of the zoom range - namely 18mm. I'm confused. Weren't we interested in the focus (sharpness) of the lens at different zoom setting?
And lenses are usually sharpest in the middle of their aperture range typically between f/8 and f/16. That's why I want you to take a shot at 18mm and f/3.5
Dec 16, 2017 17:14:04 #
Merlin1300 wrote:
No. My concern was only at the Wide end of the zoom range - namely 18mm.
And lenses are usually sharpest in the middle of their aperture range typically between f/8 and f/16. That's why I want you to take a shot at 18mm and f/3.5
And lenses are usually sharpest in the middle of their aperture range typically between f/8 and f/16. That's why I want you to take a shot at 18mm and f/3.5
Okay, first, one of the Images (above) was at 18mm (albeit at f4.0).
Anyway, here it is at 18 mm, 1/20 sec at f3.5, ISO 400, Flash fired. It does seem a little soft but I suspect that is because I was unable to hand-hold it very steady at 1/20 sec. In any event, I am still happy with the lens choice... perhaps even more so after all this.
Interestingly, I downloaded PhotoMe and found it already installed. <oops> I guess my real question is how did you use PhotoMe to retrieve the Metadata for the Image in your browser? (I am using Internet Explorer v11.)
Dec 16, 2017 23:00:09 #
RonBoyd wrote:
Yes - - I think you definitely had better luck with your lens than I did with mine.Anyway, here it is at 18 mm, 1/20 sec at f3.5, ISO 400, Flash fired. It does seem a little soft but I suspect that is because I was unable to hand-hold it very steady at 1/20 sec. In any event, I am still happy with the lens choice... perhaps even more so after all this. Interestingly, I downloaded PhotoMe and found it already installed. <oops> I guess my real question is how did you use PhotoMe to retrieve the Metadata for the Image in your browser? (I am using Internet Explorer v11.)
I don't run PhotoMe in a browser - - my version is stand-alone
I have a link to PhotoMe in Send-To and I just right click on the image file and SendTo PhotoMe
Dec 16, 2017 23:53:44 #
Merlin1300 wrote:
I don't run PhotoMe in a browser - - my version is stand-alone
I have a link to PhotoMe in Send-To and I just right click on the image file and SendTo PhotoMe
I have a link to PhotoMe in Send-To and I just right click on the image file and SendTo PhotoMe
I meant the image was in the browser, <chuckle> Anyway, I understand. Thank you for the tip.
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