I own a full frame 50mm 1.4 lens so when listing the 56mm at f1.4 I was asleep at the switch; its a f1.2 lens.
I prefer the f2 lens as it is lighter and this is important for me, possibly not you, especially if you are younger and still think photography is about being part Sherpa. So I thought I would throw a few Herb Keppler quotes at you, you can see his view of heavy bags and heavy lenses progress over the years, with him at the now defunct Popular Photography magazine. Sadly, he is now defunct as well:
On lugging gear:
"The older I get, the less inclined I am to overload by camera bag and then stagger out to take pictures. I try to pick and choose equipment thoughtfully, with a view to low bulkiness and light weight. The last type of case I think of using is a giant hold-everything bag."
(Popular Photography, May 1988)
On flimsy tripods:
The "flimsy" tripod you take with you is better than the one you left at home:
"The truth is that I probably have collected more sturdy tripods than anyone else within a hundred-mile radius. But unless I'm within easy walking distance of home or can stash the tripod in the car for convenient transportation, you will find me happily taking pictures with a flimsy tripod at hand."
(Popular Photography, February 1993)
On digital software:
On going digital:
"Sitting over a hot computer ain't my idea of fun. My creativity goes almost completely into picture taking. (But) I suppose if I ever retired, I would enjoy learning the Photoshop craft far more than playing golf."
(Popular Photography & Imaging, January 2005)
So you are a street photographer with the X100 series and want a tilt screen to shoot from belt level:
A case for eye-level viewfinders:
"When photographing people from mid or close distance, waist-level SLRs and TLRs tended to be angled upward, often capturing everything below the jawline-and the subject's nostrils-in great detail. Not a pretty picture."
(Popular Photography & Imaging, March 2005)
The desert Island conundrum:
If you were alone on a deserted island and could only have one camera and lens, what would it be?
"An all-mechanical Nikon F with a coupled selenium meter (no battery) and a 105mm macro lens to photograph flora and fauna, big and small, and to take a fine portrait of the person who rescues me!"
(Popular Photography & Imaging, August 2006)
And finally linking the 50mm f2 lens to Herb's humourous sayings and wisdom:
On choosing a lens for an SLR:
"If you don't need a superfast lens (f/1.4, f/1.2) buy the slower (f/1.7, /1.8, 2), which will probably be cheaper, of as good or better quality, and far superior for getting good sharp close-ups."
(Modern Photography, January 1980)
MISS YOU HERB, the man who brought approachable photography to me.
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It is better to have shot and lost, than to never have shot at all.