02-18-2011, 03:52 PM
[quote name='miro' timestamp='1298043880' post='6225']
Hello PZners,
As already motioned in several treads I have bought Tamron 70-300 VC EF mount.
It is my first telephoto lens and even more It is my first IS/VC lens.
The new focal length opens the new photographic opportunity.
After few weeks of learning I can make some decent shoots. Not toppers but just good enough for beginner.
But I have one technical problem with this Tamron 70-300 VC.
1. I cannot take pin-sharp images handheld with VC enabled. Even at S= 1/200sec
2. I can make pin-sharp images handheld with VC disabled and speed S=1/200sec
I examine the images the RAW images from my 50d at 100%view.
The images with VC are sharp but I have blur = less than 1 pixel in any direction. It worns me that this is VC blur. The handheld blur at S=1/200 must be only in one direction.
I have several technical questions.
1. Is it normal that I cannot take an even one single image with VC, that is as sharp as image taken at tripod + MLU? - Keep in mind that I can take some pin-sharp images handheld with VC-off.
2. What are the tolerances for motion blur introduced by VC/ IS?
3. In which situation I have to switch off the VC?
- Tripod is one of them.
- what about monopod?
- what about holding the lens with hand against three or wall?
- what about holding the lens on top of your backpack or ground.
…………
4. Do I need to switch the VC at higher shooter speeds e.g S=1/1000sec?
Thanks in advance,
Miro
[/quote]
It is normal to NOT take photos with VC/IS enabled on tripods. Unless the lens has tripod detection that will turn off the image stabilization, you will get nasty effects from the VC feeding back to itself, and if I understand you correctly, this is your problem.
So.. VC is only for handheld. Monopod might work, try. Handheld with you leaning against something should be ok. Lens on top of something, also turn off VC.
You just only need VC when handheld, and then only when the exposuretimes get to be too long. On tripod, turn it off.
Hello PZners,
As already motioned in several treads I have bought Tamron 70-300 VC EF mount.
It is my first telephoto lens and even more It is my first IS/VC lens.
The new focal length opens the new photographic opportunity.
After few weeks of learning I can make some decent shoots. Not toppers but just good enough for beginner.
But I have one technical problem with this Tamron 70-300 VC.
1. I cannot take pin-sharp images handheld with VC enabled. Even at S= 1/200sec
2. I can make pin-sharp images handheld with VC disabled and speed S=1/200sec
I examine the images the RAW images from my 50d at 100%view.
The images with VC are sharp but I have blur = less than 1 pixel in any direction. It worns me that this is VC blur. The handheld blur at S=1/200 must be only in one direction.
I have several technical questions.
1. Is it normal that I cannot take an even one single image with VC, that is as sharp as image taken at tripod + MLU? - Keep in mind that I can take some pin-sharp images handheld with VC-off.
2. What are the tolerances for motion blur introduced by VC/ IS?
3. In which situation I have to switch off the VC?
- Tripod is one of them.
- what about monopod?
- what about holding the lens with hand against three or wall?
- what about holding the lens on top of your backpack or ground.
…………
4. Do I need to switch the VC at higher shooter speeds e.g S=1/1000sec?
Thanks in advance,
Miro
[/quote]
It is normal to NOT take photos with VC/IS enabled on tripods. Unless the lens has tripod detection that will turn off the image stabilization, you will get nasty effects from the VC feeding back to itself, and if I understand you correctly, this is your problem.
So.. VC is only for handheld. Monopod might work, try. Handheld with you leaning against something should be ok. Lens on top of something, also turn off VC.
You just only need VC when handheld, and then only when the exposuretimes get to be too long. On tripod, turn it off.