Lesuediane said:
So you would suggest the 50mm over the 40mm ? I almost ordered the 50mm when I ordered the camera , talked myself out of it .
With prime lenses there are probably two situations you'd want to target at first:
1) "Walkaround" general purpose lens - on APS-C ranges between 24mm-35mm
2) "Portrait" lens - on APS-C ranges between 40mm-60mm
One thing to consider before buying a prime lens is not only the focal length and speed which are often the primary characteristics people focus on, but also other factors that will greatly affect image quality such as: sharpness across the frame, chromatic aberration, autofocus speed, build quality, image stabilization.
So some of the portrait lenses that are popular on APS-C specifically are:
1) EF 40mm pancake prime - Portable, light, quiet focus, nice bokeh, and better overall image quality than the 50mm f/1.8. The only problem is that 40mm is on the short end for portraiture focal length wise. But that aside, this lens will generally have better output than the 50mm 1.8. No IS.
2) EF 50mm f/1.8 II prime - Portable, light, but loud focus and harsh bokeh that looks like pentagons instead of circles at f/4 and over. No IS. Build quality is pretty bad and this lens (or the 1.4) will most likely be replaced by the 50mm f/1.8 IS within the next 6 months - though that lens will easily be over $500 when it comes out.
3) EF 50mm f/1.4 USM prime - Larger than the first two, decent bokeh but still not as good as many other Canon lenses. Autofocus mechanism seems to break very easily on this lens. No image stabilization.
4) EF-S 60mm f/2.8 Macro USM - I have heard great things about this one, and while you will need a bit more space to shoot with it, you will you will likely get better results than you would on any of the first three above based on the feedback I've heard. Plus it can be used for close up macro photography in addition to portraits. Not really any downsides on this lens aside from it lacks IS and is more expensive than the first three.
5) EF-S 17-55mm f/2.8 IS USM Zoom - This is one of the best lenses available for the T4i, and I personally have shot some excellent portraits with it. The build quality and optical quality are both top notch, and it is extremely versatile. It can be used as a wide angle, portrait, or anywhere in between. At f/2.8 it is much faster than a kit lens, and it has image stabilization. If you were to buy only two additional lenses for your t4i ever, I'd recommend this one and the 55-250 STM. Note that it is likely that the 50 1.8 IS will likely trump this lens in image quality once it is released (since it apparently uses the same optical design as the fantastic stabilized 24-28-35mm lenses).
In summary: The 40mm is too short for portraiture and lacks IS, the 50 1.8 has poor bokeh&build and lacks IS, and the 50 1.4 has a track record of breaking easily and still isn't quite up to snuff with modern standards. The 60mm Macro would be a good buy IMO if you can cope with it lacking IS.
So, my recommendation would be:
* to save up for the 17-55mm f/2.8 IS USM zoom (great quality, most flexible, has IS ~$799)
* get the EF-S 60mm Macro (great quality, and has macro mode, most affordable of these at ~$399)
* wait for the upcoming 50mm f/1.8 IS USM (best quality, has IS, but isn't available yet ~$599)