Showing results for 
Show  only  | Search instead for 
Did you mean: 

EF vs EF-S interchangeability


I know this has been discussed before, but I have a fairly specific case and I'm still not sure how the discussions apply.  My wife has agreed to photograph a relative's wedding.  She has done some semi-pro photography before but her Sony alpha DSLR has been acting up and she is buying an m50 as a backup.  She needs to buy lenses quickly.  

If she buys an EF 50mm and an ef-s 50mm and takes a picture from the m50 (aps-c) with each lens, in the same place, will the two pictures produced by the camera subtend the same visual angle or will one of them portray a larger apparent visual angle?

We don't have time to experiment with lots of things and do three or four rounds of shipping to get the fovs she needs covered. It would also be nice not to waste money on redundant lenses if EF and EF-S focal ranges behave differently when used on her camera.


No, You still have it wrong…..

An EF 50mm and an EF-S/EF-M 85mm will NOT produce similar field of view. Not even close.
Neither will an EF 85mm and an EF-S/EF-M 50mm.  If she buys an EF 50mm and an ef-s 50mm, they will both look the same when used on the same camera.

Mike Sowsun

View solution in original post


This article aims to address the question: how does your digital camera's sensor size influence different types of photography? Your choice of sensor size is analogous to choosing between 35 mm, medium format and large format film cameras — with a few notable differences unique to digital technology. Much confusion often arises on this topic because there are both so many different size options, and so many trade-offs relating to depth of field, image noise, diffraction, cost and size/weight.


Background reading on this topic can be found in the tutorial on digital camera sensors.


View solution in original post

Read this: 
As has been said, a 50mm lens is a 50mm lens, no matter the mount: EF or EF-S.  What makes the difference is what the sensor can capture from what the lens projects into the camera.  For a full explanation see:

cheers, TREVOR

"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris

View solution in original post


My wife did one other wedding, a similar situation for friends that worked out well.

Other than that, she's done lots of outdoor family, couple, baby, newborn cow, etc. shoots and I've seen plenty of dates changed last minute to either use cloudy days or avoid sunny ones.  I've also played pack mule for plenty of equipment while she moves everyone around chasing shade.

She's very aware weddings are more limiting, but the family is artsy enough to understand, and will almost certainly try to accommodate placement when possible.

The real risk I see is the time between  the wedding and when the photos are done.  She exclusively shoots RAW so she'll come back with who knows how many images that need to be filtered down to the <unknown number> best, then post processed.  She will instinctively want to spend an hour or more each tweaking each to perfection in Photoshop.  If I don't help her accept that getting those last 3 pixels perfect on every shot isn't worth, it she'll be at it for a month or more.

Most people don't pixel peep, only photographers.  They will likely be happy to get reasonable photos, but sooner than later so they can share the moments with their friends and family.

cheers, TREVOR

"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris

That process doesn't seem to be a good one at all.  I strongly recommend shooting in RAW+JPEG so that a preview album can be created as quickly as possible for the couple to review them and pick out their favorites.  Then spend the time on editing those.

Ultimately, there should be some contract that makes it clear when the couple will receive their photos, albums, etc.   And both sides must also agree to those timelines.


Camera: EOS 5D IV, EF 50mm f/1.2L, EF 135mm f/2L
Lighting: Profoto Lights & Modifiers


" I've seen plenty of dates changed last minute to either use cloudy days ..."

A cloudy day is your friend if the wedding is outdoors. Other than that you have my recommendation.  A Rebel T8i with standard kit, 17-55mm lens, and add an ef-s 55-250mm lens.

I have not used jpeg, period, a all for the last 15-20 years or so, 100% Raw. The thought of saving two copies is a valid one but the fact that the cameras you are gong to use don't offer two separate sources to save photos,  adding a jpeg to an already saved Raw image is useless and wastes SD capacity. At the very least I would advise her to have a separate SD card for each part of the wedding. Getting ready, first view, ceremony, wedding party and reception, etc., and even more is even better.

"... tell folks you are shooting the wedding and ask them to let you get your shots."

The only time this may be necessary is during the ceremony.  The photographer should be not seen as much as possible. The photographer is not part of the proceedings and should not be. The photographer is the traffic cop much of the time so be prepared for that. I have directed more weddings than a wedding planner! You would be surprised how little people know about weddings when the actual wedding day arrives.

Last word, Raw and Photoshop is your friend, She will do just fine. 😉

EOS 1DX and 1D Mk IV and less lenses then before!
click here to view the press release