Just something for fun. What do you consider the one must have lens, or one lens you couldn't be without, or the one lens you lust after from each manufacturer or mount if you want to go that far.
Canon: 70-200/2.8 IS (owned)
Nikon: 24/1.4 (dreamed)
Sony: 135/1.8 (dreamed)
Sigma: 85/1.4 (wanted)
Tamron: 60/2 macro (wanted)
Tokina: 17/3.5 (pending delivery)
Panasonic: 25/1.4 (dreamed)
Olympus: 75/1.8 (dreamed)
Samsung: 85/1.4 (dreamed)
Fujifilm: 35/1.4 (dreamed)
other brands: no idea, as most are manual focus and I'm not into these, for better or for worse.
Hmm, this is kind of tough considering I'm only attached to two systems and not much of an alt shooter...
Canon EF:
Current: 70-200/4 L IS - It's probably my most used lens on this system now that most of my 50mm and wider work is done with Leica. When it was released it was a definite optical improvement over the f/2.8 IS version of the time. Sharper, faster, more precise AF, better contrast, better handling of backlit situations, better IS, and way smaller and lighter. Haven't often missed having f/2.8. Haven't missed the size and weight.
Future: 200-400/4 L IS with built-in 1.4x TC. If this lens lives up to the hype and Canon doesn't price it out of the stratosphere (latest rumor is $15K US ), it will be my only 200mm + lens, replacing the 300/4 IS, 400/2.8 IS and 600/4 IS.
I don't shoot any alts on my Canon system because I wanted to downsize, hence the partial transition to the Leica M9, and that's where my money has gone over the last couple years:
Current: 21 Lux - There are other better (sharper, higher contrast) lenses at this and other focal lengths, from Leica, and others, but it's still a unique lens when desiring subject/background isolation wide open (CV21/1.8 is close, but noticeably not as dramatic). Otherwise I'd probably vote for the 21 SEM - small, super high resolution with great contrast and color.
Voigtlander 21/1.8 - Probably the best all-round 21mm M series lens for the combination of speed, sharpness (once stopped down a bit, though centrally very good at close distances) and price.
Voigtlander 12/5.6 LTM - very small with quite good performance, and not too expensive either. Included because it's LTM. IMO, they ruined it with the huge hood design when switching to M mount and also dropping the 30cm minimum focusing distance.
Nikkor 5cm f/1.4 LTM - a nice Sonnar lens with character wide open.
On the wish list:
Konica 60/1.2
Zeiss ZM85/2 - I've used enough to know it's really nice! Also easy to focus.
ZM35/1.4 - supposed to arrive this year - what characteristics will it have?
Canon: 17TSE
Nikon: 55macro
Contax Zeiss: 35/1.4(c/y) 45/2(G)
Leica R: 35-70/4 or APO 90
Konica: Hexanon 57/1.2
Zeiss: Zeiss Distagon 21 f/2.8
Leica M: Summilux 50 Asph
Olympus: OM 50 macro
Voigtlander: APO macro
Minolta: MC 58 f/1.2 I have it, & my collection is more or less complete.
Topcor: RE: 28, 35, 100, 85(I'd like it the most I think), I also really want to try one of their RF lenses.
Helios 40, again, last one was damaged in shipping.
Jupiter 3 50/1.5
Leica: 28mm f/2 Summicron-M ASPH (hard choice between this and the 50 cron)
Zeiss: 50mm f/1.5 Sonnar-C ZM (hopefully soon the be replaced with the new ZM 35/1.4)
Canon: 17mm TSE
Nikon: 28mm f/1.4 AF-D
Sigma: 30mm f/2.8 DN EX
Pentax: 50mm f/1.4 SMC-M (sentimental)
Voigtlander: 21mm f/1.8 ultron
Further I have no experience with brands so can't pick.
Zeiss: MP 100/2
Sigma: 50/1.4
Canon: hmmmm, I have only 2 canon lenses (40/2.8 and 200/2.8), which are nice lenses, but I don't "need" them.
Minolta: 58/1.2
), it will be my only 200mm + lens, replacing the 300/4 IS, 400/2.8 IS and 600/4 IS.
Having a setup where I only had one lens from any given maker wouldn't make any sense to me.