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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 12 Sep 2019 (Thursday) 14:42
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-= 90D owners unite! Discuss and Post Photos

 
DreDaze
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Oct 16, 2019 17:58 |  #1021

cdmazoff wrote in post #18945454 (external link)
The only drawback is the price difference. Canon lens + TC costs double + what you would pay for a third party

and the 2/3 of a stop of light...

some recent shots...not going to lie, i still question the AF...it's causing me to take more bursts than normal as i want to get at least one in focus...not the best light with these though, so maybe that was a factor

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markesc
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Oct 17, 2019 00:38 |  #1022

Tom Reichner wrote in post #18944208 (external link)
.
I have read many reviews of the Tamron, and people who have used both the Tamron and Canon supertelephotos have said that while they like the Tamron, and consider it a great value, its autofocus is not as fast to acquire and lock onto a subject as the Canon lenses are.

So, since the discussion here was specific to autofocusing on birds in flight, I think that when Mark said something about "outgrowing the Tamron", he probably meant that the person he was responding to would eventually find that for very demanding BIF photography, Canon lenses would probably perform better than the Tamron in the most challenging situations.

Once someone gets really good at something, and their skills surpass the ability of the gear they are using, then they tend to upgrade to better gear, so that the gear is not the limiting factor. . That could be described as "outgrowing the gear". . I don't think that is insulting - it is just coming to a realization that a $900 lens is not going to perform as well in every facet as a $2,000 or $5,000 or $12,000 lens performs.

For several years, I used a Canon 50D as my main camera body. . Many people who knew me often said that I would do so much better when I upgraded to a more capable camera body. . I had this said to me dozens and dozens of times over the years, and never took it as an insult to either my 50D nor to myself. . It wasn't derogatory. . It was just people being realistic, and stating a fact. . I finally did upgrade, to a 1D Mark 4, and the photos I produced with the Mark 4 were much better than those I had been producing with the 50D. . Same photographer. . Same skills. . Much better photos, and more of them.

.

Agreed - Having owned V1 of the Tamron, and having it sent back for a firmware update, them moving to the 100-400II, the keeper rate as well as pure sharpness was just better. So while the Tamron isn't "bad" it's a nice lens, but I personally ran into its limitations for a number of scenarios for BIF. Can it nail a few tough shots here n there? yes! Did it do so consistently? No. I realized with it that if you have say a harrier hawk flying slightly towards the camera, but mostly laterally, without any distractions around it, and did this same shot on multiple occasions, it just would not nail most of them. I had it for about 7-8 months and then hopped on the 100-400 II. Everything improved. So the intent wasn't' to hurt anyone's feelings, it's like anything, it's a stepping stone, just like the 100-400II is a stepping stone to getting to say a 400 DOII / 500 F4 / 600 F4. We each have our own individual expectations. Most people racing cars start in carts, or a miata, before they get to the Porsche GT2. That was the spirit of what I was getting at.


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thomste
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Oct 17, 2019 00:51 |  #1023

markesc wrote in post #18945767 (external link)
Agreed - Having owned V1 of the Tamron, and having it sent back for a firmware update, them moving to the 100-400II, the keeper rate as well as pure sharpness was just better. So while the Tamron isn't "bad" it's a nice lens, but I personally ran into its limitations for a number of scenarios for BIF. Can it nail a few tough shots here n there? yes! Did it do so consistently? No. I realized with it that if you have say a harrier hawk flying slightly towards the camera, but mostly laterally, without any distractions around it, and did this same shot on multiple occasions, it just would not nail most of them. I had it for about 7-8 months and then hopped on the 100-400 II. Everything improved. So the intent wasn't' to hurt anyone's feelings, it's like anything, it's a stepping stone, just like the 100-400II is a stepping stone to getting to say a 400 DOII / 500 F4 / 600 F4. We each have our own individual expectations. Most people racing cars start in carts, or a miata, before they get to the Porsche GT2. That was the spirit of what I was getting at.

Mark was responding to me and I wasn't offended at all. His response made perfect sense as it is true that we can't expect a $1k dollar lens to be just as good as a $10k one.
I am very happy to spend more money if it helps getting better results, so I will rent a 100-400 mk ii with a 1.4x tc and test the AF performance with BIF.
The Tamron is a very sharp lens for anything that doesn't move or doesn't move too fast but I haven't been able to get decent shots of fast moving subjects.
If the 100-400 with 1.4x AF performance allow me to get much better results then I will definitely get one and sell the Tamron.

Then when I grow up I will buy a 600 f4.....although there will probably be a 600mm 1.8 by then :D




  
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Oct 17, 2019 11:01 |  #1024

thomste wrote in post #18945773 (external link)
Then when I grow up I will buy a 600 f4.....although there will probably be a 600mm 1.8 by then :D

You better hit the gym if you are going to heft a 600/1.8!


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Oct 17, 2019 13:01 |  #1025

Question about autofocus points. Can anyone explain this?

Hi ... the Eagle was shot with the 90D, the RTH with my previous camera the t7i. Both are in focus. In both the autofocus points don't make sense.

I've seen photos from Tim Boyer where the focus points that are lit up are not on the the bird, and others tell me this can happen. But what exactly is it that happens.

I have plenty of photos where the focus points are red and where they should be but MORE where they are not


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Oct 17, 2019 13:13 as a reply to  @ post 18944168 |  #1026

Some Barn Swallow Success!!! Much stalking involved!!


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JayLT
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Oct 17, 2019 13:54 as a reply to  @ cdmazoff's post |  #1027

Hard to say overall, but most likely (based on my experience at airshows and such) is that the movement of the object and the camera caused the focus point to be slight off when the shutter was pressed to take the pic. In other words, there probably was something that activated those focus points, and either by your movement for framing, or the birds movement of wings etc, the object was no longer covering those points when the shutter was released. With fast moving jets I've seen it happen. Of course I would be way off base in your situation as well!


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kevb123
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Oct 17, 2019 15:06 |  #1028

cdmazoff wrote in post #18946011 (external link)
Question about autofocus points. Can anyone explain this?

Hi ... the Eagle was shot with the 90D, the RTH with my previous camera the t7i. Both are in focus. In both the autofocus points don't make sense.

I've seen photos from Tim Boyer where the focus points that are lit up are not on the the bird, and others tell me this can happen. But what exactly is it that happens.

I have plenty of photos where the focus points are red and where they should be but MORE where they are not

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canons autofocus is garbage! i use single point only then at least you know its going to focus on the bird




  
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Levina ­ de ­ Ruijter
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Oct 17, 2019 16:01 |  #1029

cdmazoff wrote in post #18946011 (external link)
Question about autofocus points. Can anyone explain this?

Hi ... the Eagle was shot with the 90D, the RTH with my previous camera the t7i. Both are in focus. In both the autofocus points don't make sense.

I've seen photos from Tim Boyer where the focus points that are lit up are not on the the bird, and others tell me this can happen. But what exactly is it that happens.

I have plenty of photos where the focus points are red and where they should be but MORE where they are not

The focus points ONLY show you which ones were used. They tell you nothing about where focus was acquired exactly. Especially with moving subjects, the actual taking of the photo will always be a fraction later than the focus lock.


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Archibald
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Oct 17, 2019 16:04 |  #1030

kevb123 wrote in post #18946073 (external link)
canons autofocus is garbage! i use single point only then at least you know its going to focus on the bird

When I use single point, it rarely focuses on the bird.


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Oct 17, 2019 16:39 |  #1031
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Archibald wrote in post #18946099 (external link)
When I use single point, it rarely focuses on the bird.

Surely single-point focus means the camera will focus on whatever is in that little square when the shutter is pressed? If that square is on the bird, it should focus on the bird, right?

Or are you saying a single point is hard to align with a moving subject. If so, that bit I understand! :-)


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Oct 17, 2019 17:14 |  #1032

Spencerphoto wrote in post #18946120 (external link)
Surely single-point focus means the camera will focus on whatever is in that little square when the shutter is pressed? If that square is on the bird, it should focus on the bird, right?

Or are you saying a single point is hard to align with a moving subject. If so, that bit I understand! :-)

Ever done BIF?


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John ­ Sheehy
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Oct 17, 2019 19:03 |  #1033

Spencerphoto wrote in post #18946120 (external link)
Surely single-point focus means the camera will focus on whatever is in that little square when the shutter is pressed? If that square is on the bird, it should focus on the bird, right?

Or are you saying a single point is hard to align with a moving subject. If so, that bit I understand! :-)

There's that, but also, you can't even see something small in the viewfinder if it is out of focus to begin with. You can't get center-point on a subject if you can't even see it. It really doesn't take much mis-focus for a bird or plane to merge into blue sky and not be seen at all, and if you try to focus when the subject is not under the focus points, the lens will go out of focus if it wasn't already.




  
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Oct 17, 2019 19:13 |  #1034

birds and landscapes...pretty much mostly what i do...it's been kinda crazy, when editing the owl shot, i was doing a lot of viewing/touch up stuff at 300%, don't think i've ever done that before...also for the landscapes, i'm pretty impressed with the dynamic range i can pull out of a raw shot

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Oct 17, 2019 19:46 |  #1035

DreDaze wrote in post #18946174 (external link)
birds and landscapes...pretty much mostly what i do...it's been kinda crazy, when editing the owl shot, i was doing a lot of viewing/touch up stuff at 300%, don't think i've ever done that before...also for the landscapes, i'm pretty impressed with the dynamic range i can pull out of a raw shot

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That owl shot is fantastic!


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