p.30 #1 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
Is anyone else seeing focus errors? My lens, especially close up, but also on many distant shots, seems to front focus.... something I've never had happen on mirrorless before. Tested several situations and it's very reproducible. Manually focused shots are quite impressive optically, but I noticed a fair bit of softness in many situations and after testing it showed that the lens was front focusing. I went back to see if they had a second lens available, but they'd sold the others, and they did order another for me, but I hope it's not systemic (or if it is, that they release a firmware update quickly. )
It does seem more prone to the focus error in single shot...CAF doesn't seem to do it nearly as much.
p.30 #2 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
Mostly shot AF-C, but mine was pretty accurate except very close to close focus distance. Even then it seemed pretty good, but it did have a couple of misses. I think I only had one miss at moderate distance. And that was stopped down to f/11 and focus was dancing a little bit.
Jman13 wrote:
Is anyone else seeing focus errors? My lens, especially close up, but also on many distant shots, seems to front focus.... something I've never had happen on mirrorless before. Tested several situations and it's very reproducible. Manually focused shots are quite impressive optically, but I noticed a fair bit of softness in many situations and after testing it showed that the lens was front focusing. I went back to see if they had a second lens available, but they'd sold the others, and they did order another for me, but I hope it's not systemic (or if it is, that they release a firmware update quickly. )
It does seem more prone to the focus error in single shot...CAF doesn't seem to do it nearly as much. ...Show more →
p.30 #3 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
I didn't test much yet, but from dozen of shots I made, I also got impression that it some of those shots are front-focused, but.... I am sure it is human (mine) error. I doubt that there is real front-focusing issue.
p.30 #4 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
I can assure you that on my copy, it is definitely not human error. There's definitely a front focusing tendency, especially close up and at 75 mm at any distance. I made sure to stay stockstill and focus directly on a fixed point on an angled surface and the resulting shots were about 1 to 2 in front focused when focusing at around 3 ft distance. antst wrote:
I didn't test much yet, but from dozen of shots I made, I also got impression that it some of those shots are front-focused, but.... I am sure it is human (mine) error. I doubt that there is real front-focusing issue.
p.30 #5 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
Try slowing down a touch. Let it settle in on the target. I would also try flexible spot S/M/L and see if one is more accurate than the others. Than I’d try AF than switch to manual magnify it and see if on target. Or go into AFS with magnify and see if is crisp. Please use a tripod your not that steady folks . Trust me. Lol
p.30 #6 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
I have done all of these, which I did after seeing potential cause in many initial images. I'm seeing the issue in AF-S on flexible spot small and medium, much more accurate at AFC, and can definitely see the focus point slightly ahead, even when focusing magnified...and can roll it back manually to the correct location.
The question is whether it's just my lens or all. Weird part is that there are times it's good. I will do more testing for sure.
GMPhotography wrote:
Try slowing down a touch. Let it settle in on the target. I would also try flexible spot S/M/L and see if one is more accurate than the others. Than I’d try AF than switch to manual magnify it and see if on target. Or go into AFS with magnify and see if is crisp. Please use a tripod your not that steady folks . Trust me. Lol
p.30 #7 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
Up to now, I have shot mine exclusively on AF S and Small Flexible Spot and it is nailing focus up very close and out to 20' or so. I have lots of Poppy photos focused perfectly on the center.
p.30 #9 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
Jman13 wrote:
I have done all of these, which I did after seeing potential cause in many initial images. I'm seeing the issue in AF-S on flexible spot small and medium, much more accurate at AFC, and can definitely see the focus point slightly ahead, even when focusing magnified...and can roll it back manually to the correct location.
The question is whether it's just my lens or all. Weird part is that there are times it's good. I will do more testing for sure.
p.30 #10 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
Jman13 wrote:
I have done all of these, which I did after seeing potential cause in many initial images. I'm seeing the issue in AF-S on flexible spot small and medium, much more accurate at AFC, and can definitely see the focus point slightly ahead, even when focusing magnified...and can roll it back manually to the correct location.
The question is whether it's just my lens or all. Weird part is that there are times it's good. I will do more testing for sure.
I saw on one of the AF videos, the tamron got a little jittery, and I'm thinking it probably needs some firmware fix, because that isnt right.
p.30 #11 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
Might have seen something similar in one scenario with close focus and 75mm, but nailed a bunch of others with same settings, so it wasn’t repeatable in my end. If it’s a larger issue, seems like it should be easily fixable with firmware, not that it makes you feel better right now...
p.30 #12 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
Rob L wrote:
Up to now, I have shot mine exclusively on AF S and Small Flexible Spot and it is nailing focus up very close and out to 20' or so. I have lots of Poppy photos focused perfectly on the center.
p.30 #13 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
Mathieu18 wrote:
No one is perfect Guy! I'm a bit beside myself though. Here I am demoing a new lens and you're sitting on the side lines. I hope this isn't the new normal, no way my wife would be as patient as yours must be.
Full size images here if anyone wants to see. Harsh mid-day sun, these aren't art, but they show the lens well enough.
Small flexible spot, with the focus point placed on the point in the middle of the M here, 75mm, f/2.8...probably the worst example. I took multiple shots with the same result. Was bizarre almost.
Another at 75mm f/2.8 from a further difference, medium flexible spot. The differences here are a little more subtle, but the AFed shot is definitely notably softer, and in the full image it's focused forward in the AF shot.
Interestingly enough, when shooting indoors in dim light, I'm not seeing these focus errors...perhaps because the camera is relying more on contrast detection in dimmer light.
And a nice, properly focused shot to enjoy...when the AF hits, it appears to be a pretty good lens. Hopefully, they'll do a firmware update quickly, or I'll get my replacement lens without such errors. http://www.jordansteele.com/2018/columbus_tamron.jpg
p.30 #16 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
Juha Kannisto wrote:
Yeah, the bridge next to South entrance of Shinjuku station is my standard spot to try out new lenses whenever I buy a new one in Shinjuku (e.g. usually from Map Camera) I know some other locals who also use the bridge to do the same thing. I agree about Tokyo being a great location for photography, I especially like the various events that happen every weekend during the summer season. I've also been to the camera shops quite a bit as I've been a bit of a lens collector these last 5 years or so and took a lot of interest in some legacy lenses too, some of the best shops are in Shinjuku so I often go there to check them out. This weekend there is another used camera & lens fair in Shibuya too, might drop by to check it out though no plans to buy anything now......Show more →
So jealous. I went to Map twice, Bic and Yodobashi too. Plus countless small shops with lots of vintage glass, nothing like that in the US. That area is a lot of fun. I would love to live in Tokyo, but I don't speak Japanese, so job prospects are probably pretty slim. Its a really cool city.
p.30 #19 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
kdrk888 wrote:
Interesting finding, Jordan. I thought mirrorless cameras don't have front/back focus issues like DSLRs...
It's not like DSLRs since mirrorless cameras do phase detect on the sensor instead of using a separate autofocus module which sometimes needs to be micro-adjusted. I think the issue is AF accuracy and it looks like Jordan's copy is lacking or it may be a general issue with the lens.
p.30 #20 · In stock: Tamron 28-75mm f/2.8 E-mount ($799)
As guy would say, it’s a laser (at least in the middle). Actually though I’m really pleased with results across the frame. For me it’s not a landscape lens, it’s a reportage / event lens and it should excel there.
Jman’s findings are interesting though. I was working more on those crops today, so might have to try the auto then manual focus tomorrow and see if the behavior is the same. It seems subtle enough I could have missed it with all the various shooting I was doing today.
fotografur wrote:
These look good on the web Matt. How do they look on the computer to you?
Thanks for posting these BTW.
I know some other locals who also use the bridge to do the same thing. I agree about Tokyo being a great location for photography, I especially like the various events that happen every weekend during the summer season. I've also been to the camera shops quite a bit as I've been a bit of a lens collector these last 5 years or so and took