Just one lens?

[Brian Vuillemenot]

150 Apo Sironar S

[Zach In Israel]

I currently only have a Caltar 150/F5.6 on my camera. I would love to own a few more lenses but right now I don't (I also have a 300F4.5 Tessar in a barrel, but its not mounted yet). Someday I will pick up a few more lenses, but I expect its low on the list.

[Gordon Moat]

135mm, which is the one I now use the most. However, if Doctor Optic ever made a 135mm, it might be nice to own one; replace that rather plain Schneider I use now.

Ciao!

Gordon Moat Photography

[dominikus bw]

Any 150mm lens

[timparkin]

Either a 110XL or a 150 Sironar S - probably the 110

[Laurent]

At the moment it would be my 150 APO-Symmar. The only issue with it is that I can't fold it in the Tachihara, but it is a real killer in terms of sharpness.

[David Rees]

Scheider 120mm f5.6 APO L. 52mm filter thread, very small, very light, wonderful lens. Use it for 70% of my shots -- the other lenses are carried more for the exercise value of lugging a heavy backpack!

David.

[john collins]

Super Symmar 110 XL.

[Matus Kalisky]

I would go with my Fujinon 125 CMW, although a 210 on top of that makes me feel beter .

[JPlomley]

135 APO Sironar-S. What a firecracker! Having said that, I am going to pick up a 110XL to replace my 90 Grandagon/4.5, so my answer may change in 6 months time.