Wilt wrote in post #10974222
I'll modify one part for APS-C...
"(the lens that captures the) most normal-looking perspective of the face from the most usual distance we see people from (that being 8-10 ft) is the best one to use for portraits and that usually happens to be the 55-95
range on a 1.6x crop camera".
55mm on APS-C captures waist up from 8-10' (4.0' x2.7')
65mm on APS-C captures had & shoulders from 8-10' (3.4' x 2.3')
95mm on APS-C captures tight headshots from 8-10' (2.3' x 1.5')
amobnaij wrote in post #10975738
50mm is too short for head shot.
On 7D, 85 and 135 are good portrait lens. For zooms, the following two are great.Tokina
chen5108 wrote in post #10975900
On a 7D I would say +1 on the Canon 50mm 1.4.
Thanks again for your posts. As I wait for my 7D to arrive, I am yet to sell my P&S SX10 IS. Knowing that the SX10 has a 1/2.3 inch CCD sensor (something like a 25 sq.mm.) and 5-100mm (17-350mm APS-C-equivalent) focal length range, I decided to apply the above principles on it since morning with my friend's kid as my subject. Finally she ran out of patience, a 5-year old after all. So here I am, back with my curious questions. I know I am testing your patience now but please bear with my nagging and be kind to answer.
From your earlier posts, here's what I have understood -
1. 8-10 ft is the ideal distance a portrait should be shot from
2. From this distance, 55-95mm range would be the ideal focal length range to be used with an APS-C, as it would appear to be 85-150mm which is just about the right focal length range for portraiture on a full-frame.
3. These focal-length ranges are the ideal but not cast in stone. Good portraits can still be got by varying the subject-camera distance a bit in the same 8-10ft range based on the focal length range available on your lens.
If all of the above are correct, I have narrowed down on the following lens to cover most of my shooting needs, portraits being the area of focus:
1. EF 17-40mm f/4L USM - wide-angle
2. EF 50mm f/1.4 USM - standard + waist-up portraits
3. EF 70-200mm f/4L USM - tele + head & shoulders & tight headshot portraits
Seeking your suggestions/comments on whether this selection would cover it all. Of course, I am on a budget as you can see the f/2.8 or faster and IS are missing in my list. The catch-phrase for me is "reasonably above-average pics" if not pro-like as I am not one.
Wilt wrote in post #10974222
This requires availability of 25-26' long shooting area (2.5' backdrop, 5' separation to backdrop, 2' subject, 10' camera-to-subject, 2.5' camera, 3' photographer. If you have more distance (luxurious indoor shooting or outdoors), simply multiply the above FL by the proportional factor (e.g. 20' camera to subject = 2 * FL in above paragraph)
By that measure,
1. Would it be correct to apply a multiplication factor of 0.5 if the subject-camera distance is cut to half i.e. 4'-5'? Or would that start making the faces distorted?
2. What other distance variations you would suggest.
I am almost sensing that you are tempted to answer - "learn some on your known buddy, do you want all your answers in one day?"