Write ups saying a 55-250 can be like a 400mm lenes

[Dusmith1]

Let me know any truth to this I have read this on many web sites
Canon THIS REVIEW COVERS

Intended Use «

» Weight and Dimensions «

» Handling and Build Quality «


PAGE 2
» Image Quality «


PAGE 3
» Sample Pictures «

» Conclusion «

» Further Information «


TABLE OF CONTENTS



Note: this lens has a predecessor - the Canon EF-S 55-250mm f/4-5.6 IS


The EF-S 55-250mm f/4-5.6 IS II is a very popular lens. Both as a separate buy and in the twin kit edition together with the EF-S 18-55mm f/3.5-5.6 IS II that Canon ship with some of their cameras. It does make a lot of sense to combine the two because together they give you an effective focal range of 29 mm to400 mm which covers just about everything except for the ultra wide angle.

[paste:font size="5"]Intended Use
Wildlife & Sports
At 400 mm effective focal length the EF-S 55-250mm f/4-5.6 IS II is ideal for even smaller wildlife (like birds). And if you'd like to add a little context to the image just zoom out to a minimum of 88 mm. But wildlife and sports photography also require low f-stops to achieve fast shutter speeds. The EF-S 55-250mm f/4-5.6 IS II offers f/4 at the wide end but only f/5.6 at the tele end which is a little slow. At least the excellent image stabilizer helps with slower shutter speeds but of course that can't prevent blur from subject movement.

Portrait
At the wide end the EF-S 55-250mm f/4-5.6 IS II has just the right focal length for nice portrait shots. Again the aperture rating is not excellent but certainly sufficient for this purpose and the large zoom range will even allow closeups from far away.

 

[ClickAddict]

Somewhere in the article it must have mentioned which camera it was being used on. And it was a CROP Camera. A crop camera in the cannon line is a 1.6x factor on the focal length.

So 55-250 actually on a looks like a 88mm to 400mm (equivalent) Lookup" focal length comparison crop vs FF" on google for more detailed explanation.

 

[ClickAddict]

Just noticed it is an "EF-S" lens. The "-S" can only be used on the crop cameras, so even if the article doesn't say it which camera, it would be assumed.

 

[Dusmith1]

Ok so then that is why I was told to read these. Due to I shoot a canon 750d or T6I that are crop . I had been told I had to have at least 400mm to shoot wildlife but then was told to read on these

 

[Dusmith1]

Just noticed it is an "EF-S" lens. The "-S" can only be used on the crop cameras, so even if the article doesn't say it which camera, it would be assumed.

That is good to know I wondered what it ment so I can use EF and EFS

 

[ClickAddict]

Yes. It's always good to keep in mind what camera people are using when they suggest lenses for you. If you ask "I am shooting with a T6I and am looking for something ....." and they answer "a 85mm is perfect for what you need on your camera for shooting ...." Then look for a 85mm. But if you say "What's a good lens for....." and they reply with "A 50mm is perfect". Make sure they mean 50mm on crop otherwise they may be thinking you have a FF in which case, based on their suggestion, you would want something more in line with a 35mm (converts to about 56mm FF). (I've seen many posts on forums go sideways because of this assumption.)
And yes a T6I can use both EF and EF-S lenses. (Essentially any lens for a canon mount)

 

[Braineack]

Even on a crop sensor, 250mm is not long enough for real wildlife shooting.

Look at the new 150-600mm lenses.

 

[SCraig]

A 250mm lens on a Canon crop-sensor camera gives the FIELD OF VIEW of a 400mm lens, it does **NOT** provide the magnification of a 400mm lens.

 

[KmH]

As SCraig mentions, the crop factor does not change the focal length of the lens.
The crop factor means the field of view is smaller by 1.6x using a Canon APS-C size image sensor, and 1.5x using a Nikon APS-C size image sensor.
Or more accurately stated - t he field of view is equivalent to the field of view a 400 mm lens would deliver if a 400 mm lens were mounted on a full frame camera.
A 250 mm lens is a 250 mm lens regardless the size of the image sensor.

 

[beagle100]

Even on a crop sensor, 250mm is not long enough for real wildlife shooting.

Look at the new 150-600mm lenses.

that 10 year old lens is still good
and still good on a 10 year old camera !!!

cropped like a 400mm lens !

 

[petrochemist118 143]

The article does say 'effective focal length' slightly different wording from the more commonly used 'equivalent focal length', but to my mind implies crop factor.

(Essentially any lens for a canon mount)

Well not the mirrorless canon mounts (EF-M or something like that) or the old manual ones FD, FL etc. all of which have shorter rear flange distances.