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telephoto converter
- Thread starter pontifex
- Start date
Mrvile
Lifer
What? Is this for photography?
EDIT: OOOOOOOOH You mean TC's 😀 😀
Yes they work.
1.4x TCs are beautiful if used on a good lens. They maintain AF most of the time, don't degrade image quality noticeably, and they give you quite a boost. However, 2x TC's will not allow you to retain AF, and will degrade the image unless used on a VERY GOOD lens.
1.4's are definately worth investing in (but since they have their own optics, be sure to get a good one like the Canon 1.4x MKII or whatever).
EDIT: OOOOOOOOH You mean TC's 😀 😀
Yes they work.
1.4x TCs are beautiful if used on a good lens. They maintain AF most of the time, don't degrade image quality noticeably, and they give you quite a boost. However, 2x TC's will not allow you to retain AF, and will degrade the image unless used on a VERY GOOD lens.
1.4's are definately worth investing in (but since they have their own optics, be sure to get a good one like the Canon 1.4x MKII or whatever).
My guess is yes 🙂
As for telephoto convertors, I tried one out over the weekend, but didnt get to spend much time using it to really get an idea as to whether it's good or bad.
EDIT: Although, with the time I did spend using it, I wouldn't get one. Unless you have a REALLY REALLY good lens to stack on.
You will lose a few f stops using them, but really no downside. the picture "may" have alittle more distrtion apparent, depth of field range will change, but in many cases they can be useful. Also saves some money, priced any 400+ lenses lately?
I use them on film and digital, as well as the macro diopters...results are passable.
A purist will scoff, yuppie snobs will put em down, but the pragmatist uses them if needed. A professional rarely uses them...but they also can justify spendong more money on equipment.
I use them on film and digital, as well as the macro diopters...results are passable.
A purist will scoff, yuppie snobs will put em down, but the pragmatist uses them if needed. A professional rarely uses them...but they also can justify spendong more money on equipment.
pontifex
Lifer
yes, it is for a camera.
i'm assuming that the higher the mm on the lens, the higher amount of zoom you get, correct? after using the 70-300 for a little while, i know i pretty much want something that can zoom in a lot on stuff that is far away. i've been looking at lens prices and my mouth just drops to the floor.
hmm...why can't i ever have a cheap hobby. i like computers, astronomy, and now photography. none of which are cheap hobbies...
i'm assuming that the higher the mm on the lens, the higher amount of zoom you get, correct? after using the 70-300 for a little while, i know i pretty much want something that can zoom in a lot on stuff that is far away. i've been looking at lens prices and my mouth just drops to the floor.
hmm...why can't i ever have a cheap hobby. i like computers, astronomy, and now photography. none of which are cheap hobbies...
Thats what I mean. You will use them if you need them. They are also cheap enough to buy, certainly less than one tenth cost of new lens.
even on the Tamron they will work, and you are not going to notice much image loss/didtortion, esp if just beginning photography.
I say try them, I have a set of oneX, 2, and 4x, and they work OK on both my f 1.4 nikkormat as they do my f 4.5 sigma.
imported_Snagle
Golden Member
One downside is the loss of light, for example:
I have a 70-200 2.8 lens. With a 1.4x converter, it becomes a 98-280 4.0. With a 2x converter, it becomes a 140-400 5.6.
Technically it sounds great, but TCs arent all theyre cracked up to be. With a 1.4x I will see a slight image quality loss and a noticeable slow-down in AF speed. With a 2x I will see a LOT of quality loss and a big slowdown in AF speed.
On a cheap zoom (which includes every 70-300 lens) it won't be worth it to even bother with a 1.4x TC. On a decent, fixed aperture zoom like most of the 70-200 2.8s or a 100-300 f4, a 1.4x TC will give you decent images at max aperture, and fairly good ones stopped down. 2x TCs aren't worth it on any zooms unless you are fully prepared to have poor quality images.
Primes are a different story. A 1.4x TC will put out nice results with the vast majority of quality primes. 200 2.8s, 300 2.8/4, etc, will all do fine with a 1.4x TC. 2x TCs can still produce some good images (even wide open) when used with high-end primes like the 300 and 400 2.8s, and you can get some great stuff if you stop them down a little. You're still going to lose AF speed, but how fun would it be to have a 800 5.6 sometimes 😛
I have a 70-200 2.8 lens. With a 1.4x converter, it becomes a 98-280 4.0. With a 2x converter, it becomes a 140-400 5.6.
Technically it sounds great, but TCs arent all theyre cracked up to be. With a 1.4x I will see a slight image quality loss and a noticeable slow-down in AF speed. With a 2x I will see a LOT of quality loss and a big slowdown in AF speed.
On a cheap zoom (which includes every 70-300 lens) it won't be worth it to even bother with a 1.4x TC. On a decent, fixed aperture zoom like most of the 70-200 2.8s or a 100-300 f4, a 1.4x TC will give you decent images at max aperture, and fairly good ones stopped down. 2x TCs aren't worth it on any zooms unless you are fully prepared to have poor quality images.
Primes are a different story. A 1.4x TC will put out nice results with the vast majority of quality primes. 200 2.8s, 300 2.8/4, etc, will all do fine with a 1.4x TC. 2x TCs can still produce some good images (even wide open) when used with high-end primes like the 300 and 400 2.8s, and you can get some great stuff if you stop them down a little. You're still going to lose AF speed, but how fun would it be to have a 800 5.6 sometimes 😛
n yusef
Platinum Member
I like TCs. They are a cheap way to get more range.
They are also one thing that I think Nikon has on Canon. The TC17E multipies the FL by 1.7 and loses 1.5 stops of light, changing f2.8 into f4.8, but the sharpness is much better than any 2X TCs I've used. It's still not as good as the 1.4s, but very usable, which can only be said about the 2Xs with the very best of lenses.
They are also one thing that I think Nikon has on Canon. The TC17E multipies the FL by 1.7 and loses 1.5 stops of light, changing f2.8 into f4.8, but the sharpness is much better than any 2X TCs I've used. It's still not as good as the 1.4s, but very usable, which can only be said about the 2Xs with the very best of lenses.
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