Comments on: Canon 135mm f/2L usm mini review

By: Randal

Randal — Fri, 14 Jan 2011 21:26:27 +0000

Geez guys. On a 1.6 cropped sensor camera, this lens is effectively 216mm. There for the old standard rule applies, speed = focal length.

admin is just applying the multiplier to the shutter speed rather than the focal length, but either way, you get the same result.

This isn’t rocket sience.

By: Allen

Allen — Wed, 12 Jan 2011 05:18:46 +0000

Leo is right on min speed. I think from optical perspective, there is no difference between cropped and FF , the sensor/lens distance is same. So the min speed should be same

But Leo is not accurate about DOF. If everything same (subject/camera distance, f number), then DOF is same. Remember that the internal image that the lens casted toward sensor is exactly same, it is only that cropped and FF sensor has different size, so cropped did not get all the image.

By: leo

leo — Wed, 08 Sep 2010 10:50:46 +0000

Enche, extra amount of enlargement required with smaller-format cameras ? That is new for me You mean smaller sensor format? With an 18 MP APS-c sensor you get bigger pictures then with an Fullframe 5D 12.8 MP. That argument does not hold.

By: Enche Tjin

Enche Tjin — Wed, 01 Sep 2010 02:21:03 +0000

Leo, the extra amount of enlargement required with smaller-format cameras increases the blur due to camera motion (shake).

By: leo

leo — Tue, 31 Aug 2010 23:08:27 +0000

Sean, you say the admin is right, but can you tell me why? Why should the crop sensor play a role in the time you can hold a camera and lens in your hand? The only thing the sensor does is giving you an crop of the image of a FF. The dept of field is different ( say F4.0 on a FF becomes F6.4 on a 1.6 factor) and that’s it. It is possible you can get blurry images at 1/135, but the size of the sensor does not play a role in it. Why can you held an 17 mm theoretical with 1/17. Because your lens is closer to your sensor. The size of the sensor does not play an role at all. That is just physical law.

By: Canon 135mm vs Canon 70-200mm

Canon 135mm vs Canon 70-200mm — Tue, 22 Jun 2010 08:16:02 +0000

[...] consider buying Canon 135mm lens or telephoto zoom lens Canon 70-200mm. I’ve tried 135mm f/2 [Review], and Canon 70-200mm f/4 IS, and here is my [...]

By: Sean

Sean — Wed, 02 Dec 2009 13:40:57 +0000

The Admin is right. You need to factor in the sensor size when estimating hand-holdable shutter speeds. Using a 1.6x sensor, a shutter speed of about 1/200 second is the best general rule (as the calculation puts it at 1/216).

By: admin

admin — Sat, 28 Nov 2009 22:06:19 +0000

Hi leo, Honestly, I am not sure about this, but shooting at 1/135, i often get blur image. Maybe becuase of the hand steadiness, weight/balance thing.

By: leo

leo — Sat, 28 Nov 2009 18:28:40 +0000

Quote [For example, when you attach this lens into crop sensor camera such as Canon Rebel series or 0XD series, then you need to set a shutter speed to at least 1/200 or greater to get a tack sharp result. It is also depend on how steady your hand is.]
This is not true. If you can make a sharp photo on a Full Frame with 1/135 seconde, then you can make a sharp photo with the same time on a crop factor camera. The distance between your lens and your sensor is the key factor here, not the crop factor. Ofcourse it wil depend how steady your hand is Also the weight of the camera will help you, the more weight the better.