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DPChallenge Forums >> Hardware and Software >> Upgrade suggestion from 1000D
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07/20/2013 03:55:59 AM · #26
Originally posted by General:

I was reading article EFS LENS so if f buy Tamron 17-50mm technically my pictures field of view would be same right ? or in layman's term wide angle experience would be same


Yes.
07/20/2013 07:33:53 AM · #27
Originally posted by General:

So 18mm i clicke acts like 28mm on 1000d or 60D 9 when i buy)....despite being a EFS it not really 18mm...Is there any wide angle lens that is made for crop sensor that would be of same focal lenght they mention?

reason is that i am getting a used tamron 17-50mm, no point to buy this if this too would become 1.6 times cause i already would have 18mm-55.. ya advantage is it is 2.8 constant


no. its still 18mm, the focal length never changes, an 18mm on a crop is still 18mm, it doesn't become 28mm. EF-S lens are made to work with crop bodies, they project an image circle that only covers the smaller sensor, EF lens will mount both crop and FF sensors, the difference being the larger image circle projected on the sensor spills off, like this:

' . substr('//www.garydatesphotos.com/superphotodude/wp-content/uploads/2010/11/crop-circle.jpg', strrpos('//www.garydatesphotos.com/superphotodude/wp-content/uploads/2010/11/crop-circle.jpg', '/') + 1) . '

looking at that picture you can see how much real estate is unused by a crop body, so an EF-S is cheaper to produce since it don't need to make a large image circle. Its also why lens like the Tamron 28-75/2.8 which is fantastic on a crop, doesn't perform so well on a full frame, because the edges aren't as crisp and there are all sorts of optical aberrations at the edges that get clipped of on a crop sensor.

in any case you need not be concerned with how your lenses perform on a full frame, only how they perform on a crop. if 18mm isnt wide enough for you from your past experience, buy a wider one.

Message edited by author 2013-07-21 10:18:04.
07/20/2013 07:40:15 AM · #28
duplicate post

Message edited by author 2013-07-20 07:40:43.
07/20/2013 07:59:21 PM · #29

That was a great explaination.it was quite helpful... any suggestion for third party wide angle lens than 18mm?
07/21/2013 03:43:52 AM · #30
The most popular third party wide zooms are:
Tamrom 10-24 or
Sigma 10-20.
Both are about or under $500 US.
07/21/2013 10:16:29 AM · #31
Originally posted by Leo:

The most popular third party wide zooms are:
Tamrom 10-24 or
Sigma 10-20.
Both are about or under $500 US.


I here good things about the sigma, i used to own the the tamron, it was very soft wide open especially at 10mm, its was great for landscapes stopped down, i tended to use it more for the extreme perspective and portraits and it wasn't up to par the way i used it so i upgraded to the canon 10-22.

if you intend to buy used its very hard to find the tamron, the sigmas are in much more supply.

another option is to find an older manual focus lens or prime especially if you intend to use it for landscape and AF isn't really required.

Message edited by author 2013-07-21 10:19:36.
07/21/2013 07:32:13 PM · #32
Thanks Mike ... weven i was thinking going for old manual lens. I undertand they would not AF but would metring work? Also possibility of old third party manual lenses says Vivitar ... i know Canon has change mount from FD to ES...but i found couple really reasonable vivitar lenses on ebay.

However if i am not happy with 18-55 than buying 70$ old 28mm Vivitar wont make sense right ? cause the effect i wam looking has to wider than 18... but sometinmes prices are tempting. I am seriously thinking of hunting manual lenses canon or third party. I some how feel Nikon would be more compaitable with olde Nikon or third party lenses than say Canon.
07/21/2013 08:02:23 PM · #33
if you want wider than 18mm you need to get wider than 18mm. I'm pretty sure metering will still work because the lens doesn't meter, the sensor does. You will lose AF and you will lose aperture control, so if you get a manual lens get one that allows you set the aperture manually. you may want to rent a ultra wide angle if you can and see what focal lengths is best for you want, it will also allow you to see the sort of distortion going wider than 18 will give you.
07/21/2013 10:31:31 PM · #34
Thanks Mike, may be 15 years back i had Zenith russian camera that had aperture ring ...... i think i would search more on old manual lenses and try to follow this path than buy modern lenses for time being.
07/22/2013 10:31:28 PM · #35
from the perspective of a former crop system owner: the 18 (or rather 28.8mm)is wide enough to shoot inside a room, but not the whole room.

The 10-22 will let you shoot a whole group in a room only a couple feet from you.

Part of the allure of the 60d is its af system (which is pretty excellent imo) if you can take advantage of it, i say do it.

nikon does apparently have better compatibility with older lenses.

Message edited by author 2013-07-22 22:32:24.
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