crop vs teleconverter
Jan 12, 2015 10:36:41 #
Marv wrote:
would cropping a picture be same as using a teleconverter to get the same close up or what would be the difference I hope I am phasing the question right I know that when using a teleconverter you lose a couple of f-stops and autofocus does not work on some lens but was wondering if cropping would give you the same effect
Unless it is a lens MATCHED converter it will degrade your image. If you don't have a long enough lens either get closer or crop. The less glass the better. Think sharpness and resolution, pixel counts are misleading and even pointless -- a lot of blurry pixel groups do you no good.
Jan 12, 2015 10:39:00 #
Marv wrote:
sorry guys I guess I didn't frame my question right what I was asking was it is worth the extra money to buy a teleconverter when If I can get the basically same shot by cropping my apologies to all of you and thanks for all the reply's you folks are great
Depends on the lens and the TC.
I agree with MTshooter. A TC is a much better solution than cropping. A few thoughts:
1) It's not generally a good idea to use a TC on a lens of less than 100mm.
2) Nikon and Sigma, whose lenses I use, both recommend you not use their TCs on lenses less then 200mm with a few exceptions.
3) Nikkor TCs do not work well with all the lenses to which they will attach, i.e., my Nikkor 200-400/4 works well with the TC14e but not so much with the TC20eII or 20eIII. The Nikkor 200/2 will accept all the Nikkor TCs and performs well with them all.
4) Kenko makes a high quality 1.4X TC that is also marketed by Tamron. It is cheap enough that you can get one and test it on your lens(es). Shop price.
Jan 12, 2015 11:24:19 #
mtparker wrote:
Depends on the lens and the TC. br br I agree wi... (show quote)
Absolutely correct! I don't have a matched TC/lens combo. But I do have the Kenko 1.5X. And it works with varying degrees of success with different lenses I try it on. But mostly I see it as softening the result. And this softening is usually enough that just cropping might be better.
I have also had some success undoing the softness with Piccure+ which attempts to position pixels to where they are supposed to be. It should not be compared to conventional sharpening which solves the problem with fancy contrast adjustments.
Jan 12, 2015 11:55:00 #
I use and recommend using Sony Clear Image Zoom over any TC ! - but you must have a Sony camera and be shooting JPEG - and preferably, a very good lens !
Jan 13, 2015 01:06:29 #
MT Shooter wrote:
Absolutely not. TC's will allow you to use the entire sensor array of pixels for the image. When you "crop" an image you are throwing away pixels. Never a good idea unless you have a large surplus of them to spare, like on the Nikon D800's.
Also, when focal length is increased (which is what a teleconverter does) perspective changes... distance between objects decreases from front to rear;
when you crop that does not happen.... As MT said
if you have a gigantic count of quality pixels, you may be able to crop a lot.
Jan 13, 2015 10:04:12 #
imagemeister wrote:
I use and recommend using Sony Clear Image Zoom over any TC ! - but you must have a Sony camera and be shooting JPEG - and preferably, a very good lens !
And, preferably be on support of some kind using good stabilization techniques......
Jan 13, 2015 10:27:32 #
MT Shooter wrote:
Absolutely not. TC's will allow you to use the entire sensor array of pixels for the image. When you "crop" an image you are throwing away pixels. Never a good idea unless you have a large surplus of them to spare, like on the Nikon D800's.
:thumbup:
Jan 13, 2015 10:43:02 #
Marv wrote:
would cropping a picture be same as using a teleconverter to get the same close up or what would be the difference I hope I am phasing the question right I know that when using a teleconverter you lose a couple of f-stops and autofocus does not work on some lens but was wondering if cropping would give you the same effect
As others have said, it depends on what you do with the image and other factors.
The TC and lens combination as well as the camera are factors. Some lens and TC combinations produce excellent results while others may not.
A boat load of pixels in reserve may sway the outcome in favor of the crop in some circumstances.
Too broad of a question to answer definitively.
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.