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Author Topic: Canon EF-S 55-250 f/4-5.6 IS STM Announced  (Read 19711 times)

silvestography

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #15 on: August 22, 2013, 11:08:46 AM »
And despite all these improvements, the new version weighs 15 grams less than its predecessor (375g vs. 390g).
This is the part that kind of surprises me. The main knock on the old 55-250 was the "cheap, plasticky" build quality. It's weird to think that they improved the housing while also making it lighter.

I'm not so sure they did. The old one had a plastic mount and from the photos on CR and B&H, it doesn't look like that's changed.

How does STM compare with USM? (Not in technical details, but in how it performs)
As a practical matter, STM makes for faster and quieter autofocusing. 

Faster than USM?  With a couple of exceptions (like the 85L), USM is much faster than STM.

Doesn't that depend on what kind of USM? I've heard the 70-300 non-L doesn't use ring USM like most of canon's lenses, but a slower, less accurate variant. As for STM being faster, that applies to live view on cameras with phase-detect AF on the sensor, like the 70d. USM will have a slight delay before focusing whereas STM will move right to your subject.

Correct me if I'm wrong.
« Last Edit: August 22, 2013, 11:14:38 AM by silvestography »
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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #15 on: August 22, 2013, 11:08:46 AM »

neuroanatomist

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #16 on: August 22, 2013, 11:47:41 AM »
Doesn't that depend on what kind of USM? I've heard the 70-300 non-L doesn't use ring USM like most of canon's lenses, but a slower, less accurate variant. As for STM being faster, that applies to live view on cameras with phase-detect AF on the sensor, like the 70d. USM will have a slight delay before focusing whereas STM will move right to your subject.

Correct me if I'm wrong.

True - I was referring to Ring USM, but there's also Micromotor USM which is quieter but no faster than a regular arc-form drive micromotor. 

I'm not sure which would be faster overall (ring USM or STM) in Live View with Phase AF - the STM lenses that I have (40/2.8, 22/2) move quite slowly relative to my ring USM lenses.  But they're also front-focusing designs.
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paul13walnut5

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #17 on: August 22, 2013, 01:25:23 PM »
I've often switherd with the original 55-250 or mk2, I could use a cheap telezoom for the days when I want light gear...

So long as this isn't priced way more than the current version I might just get one, and of course the mk1 or mk2 may actually get a wee drop in price...

Hammer

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #18 on: August 22, 2013, 01:27:33 PM »

WoodyWindy

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #19 on: August 22, 2013, 04:25:11 PM »
Holy Guacamole! The MTF looks amazing - much more like the 70-300 L than anything else, possibly better even than the 70-200 f/4 L IS.

RGomezPhotos

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #20 on: August 22, 2013, 05:06:06 PM »
When I first saw this I thought "Ho-Hum, an EF-S lens..."  But I'm becoming more fascinated with it.  It's a relatively cheap lens so I wonder about the quality.  I was highly impressed with the 18-200mm EF-S I tried a few weeks ago.  But it's also 2x the cost...

Can't wait for pics....
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trav.cunningham

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #21 on: August 22, 2013, 06:55:33 PM »
+1

Full time manual focus and rear focusing are great upgrades to this lens.

It's a promising piece of glass, now seriously starting to threaten the 70-300 IS for crop owners.

Rear focusing means it must be a different optical design than the current 55-250.

Lens what is rear focusing?

Rear focusing means the front element does not move while focusing. A big plus when using filters.

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #21 on: August 22, 2013, 06:55:33 PM »

neuroanatomist

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #22 on: August 22, 2013, 09:35:10 PM »
Rear focusing means the front element does not move while focusing. A big plus when using filters.

True, but that's not mutually exclusive.  There are front focusing lenses where the front element doesn't rotate, like the 85L, 40/2.8, etc.  A rotating front element is only an issue for polarizers and grad NDs.
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LetTheRightLensIn

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #23 on: August 23, 2013, 02:43:31 AM »
Holy Guacamole! The MTF looks amazing - much more like the 70-300 L than anything else, possibly better even than the 70-200 f/4 L IS.

yeah, other than at the corners the MTF are better than the 70-200 f/4 IS at the wide end wide open (granted that was always the weak spot of the 70-200 f/4 IS, but still....) and even at the long end, where the 70-200 is VERY good, the new EF-S lens actually has better MTF there too wide open! for the center and center mid! although the near and far edges and corners are worse and granted you are comparing f/4 to f/5.6, the 70-200 f/4 IS might be universally ahead once set to f/5.6 (then again you are comparing 200mm to 250mm too so....).

anyway it looks to be quite a fine performer, aps-c only though, slower and slower AF, still, quite a bargain, a new 'secret L' of sorts perhaps.

mrsfotografie

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #24 on: August 23, 2013, 08:29:26 AM »
MTF may be good, but color and  contrast are the question...
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jdramirez

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #25 on: August 23, 2013, 08:52:19 AM »
+1

Full time manual focus and rear focusing are great upgrades to this lens.

It's a promising piece of glass, now seriously starting to threaten the 70-300 IS for crop owners.

Rear focusing means it must be a different optical design than the current 55-250.

Perhaps it is another mini 'EF-S L' like the 17-55.
Sounds promising for the APS-C folks!

 Canon isn't going to give you L  quality and performance and not charge a premium for it. 
Upgrade  path.->means the former was sold for the latter.

XS->60D->5d Mkiii:18-55->24-105L:75-300->55-250->70-300->70-200 f4L USM->70-200 f/2.8L USM->70-200 f/2.8L IS Mkii:50 f/1.8->50 f/1.4->100L-> 85mm f/1.8 USM-> 8mm -> 85mm f/1.2L mkii

paul13walnut5

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #26 on: August 23, 2013, 11:55:03 AM »


 Canon isn't going to give you L  quality and performance and not charge a premium for it.

What is L quality and performance?

It's a term I've often heard, but I don't know what specific criteria it refers to.

It's not weather sealing because I own and have owned L lenses with and without weather sealing.
It's not AF performance, because the AF on my old TS-E 24mm f3.5L was lousy to the point of being non-exsistent.
It certainly isn't MTF figures on their own, becuase there are many non-L lenses that match or exceed L lenses in some resolution regards, such as the fast short telephoto primes.

I'm knowingly being pedantic here.  I know L is a marketing term that in actual fact means you have a red ring round your lens and thats about it, but I always have to question those blithely using the term 'L quality'.   If it's quantifiable then go on, quanitfy it.

What is L quality.

I don't think anybody is realistically expecting the 55-250 STM to have Canons best build, weather sealing, or the fastest AF, or smoothest bokeh etc etc.  But here's the rub... It's canon doing in some ways what they do best, what got me using canon EOS in the first place back in the early 90's, what keeps canon top of the market..

Right kit for the target market at the right price.

Anybody who jumps on giving budgets users half decent kit (with things like FTM and non-rotating filter threads wowsers!) because it isn't 'L quality' just looks like a snobby tit.

This lens isn't for the most serious of users, or for the phallic extension rich dads at schools sports day.  But it's the right lens for a lot of folk, and thats why canon will sell shedloads, and stay in business.

neuroanatomist

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #27 on: August 23, 2013, 12:15:51 PM »
I'm knowingly being pedantic here.  I know L is a marketing term that in actual fact means you have a red ring round your lens and thats about it, but I always have to question those blithely using the term 'L quality'.   If it's quantifiable then go on, quanitfy it.

What is L quality.

In general, the build quality of L-series lenses is more rugged than non-L lenses.  That's not always commensurate with price - compare the EF-S 17-55/2.8 IS with the EF 24-105/4L IS, two similarly-priced lenses (kit pricing notwithstanding).  The zoom the lens barrel out, the 24-105L hits the stop with a solid shhhuuuuuk sound, whereas the 17-55 hits the stop with a hollow clunnnk sound.   Turn the focus ring of a non-L vs. an L lens - the non-L often feels a bit sloppy, gritty, and has play whereas the L is smooth and well damped.   Note the technical terminology used to describe the differences  ;) .

So yeah, mostly it's the red ring and it's like one of our esteemed (or not so much) US congressmen once said about p0rn - you know it when you see it.
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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #27 on: August 23, 2013, 12:15:51 PM »

hgraf

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #28 on: August 23, 2013, 12:19:06 PM »
True - I was referring to Ring USM, but there's also Micromotor USM which is quieter but no faster than a regular arc-form drive micromotor. 

I'm not sure which would be faster overall (ring USM or STM) in Live View with Phase AF - the STM lenses that I have (40/2.8, 22/2) move quite slowly relative to my ring USM lenses.  But they're also front-focusing designs.

FWIW the 18-135 EF-S IS STM is FAST, REALLY fast at focusing. I haven't compared to ring USM, but it's way faster then the old 18-135 with micromotor, and faster then the 40mm pancake.

Even better, the STM in the 18-135 is silent. I seriously can't hear it unless I place my ear right to the lens, and even then I often can hear it. Amazing.

I can't comment on the 55-250 STM since obviously I don't have one in my hand, but if it's anything like the 18-135 STM it'll be a keeper.

TTYL

paul13walnut5

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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #29 on: August 23, 2013, 12:24:46 PM »
I'm knowingly being pedantic here.  I know L is a marketing term that in actual fact means you have a red ring round your lens and thats about it, but I always have to question those blithely using the term 'L quality'.   If it's quantifiable then go on, quanitfy it.

What is L quality.

In general, the build quality of L-series lenses is more rugged than non-L lenses.  That's not always commensurate with price - compare the EF-S 17-55/2.8 IS with the EF 24-105/4L IS, two similarly-priced lenses (kit pricing notwithstanding).  The zoom the lens barrel out, the 24-105L hits the stop with a solid shhhuuuuuk sound, whereas the 17-55 hits the stop with a hollow clunnnk sound.   Turn the focus ring of a non-L vs. an L lens - the non-L often feels a bit sloppy, gritty, and has play whereas the L is smooth and well damped.   Note the technical terminology used to describe the differences  ;) .

So yeah, mostly it's the red ring and it's like one of our esteemed (or not so much) US congressmen once said about p0rn - you know it when you see it.

"Often"

"General"

It was pretty much a rhetorical question.  Thanks for your answer anyway.  I'm not doubting that L lenses are more expensive for a reason, nowhere in your answer have you came up with the specifics.  There are for example plenty of lenses with lovely smooth focus rings that aren't part of the L family..  Don't worry, you are in good company, I can't recall Canons definition of L.

My point is that to draw negative or positive comparisons to an ill defined concept such as L or non-L is ridiculous.  It is what it is.  The greater point is that if canon is making the new cheap gear this good then the expensive gear users must have plenty to look forward to.


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Re: Canon EF-S 55-250 f/4-5.6 IS STM Announced
« Reply #29 on: August 23, 2013, 12:24:46 PM »