Originally posted by Drauen I have tried some of my old prime Pentax lenses that dates back 40 years. They are really nice to work with, and it is really back to basics when it comes to focus and light metering. But for me it is a very different experience than the superfast new lenses that makes it possible to shoot much quicker and I can rely on the camera doing the job almost without looking into the viewfinder.
Drauen
I would respectfully disagree with the notion of new of '
superfast new lenses'. I do not believe that new lenses as '
superfast' generally. In fact I would argue that most
superfast lenses are older lenses.
The fastest Pentax lens (A50mm f1.2) was developed decades ago and it has been discontinued for more than a decade.
In recent years, the fastest new Pentax lens has been the unique DA*55mm f1.4. There has been two new relatively fast Pentax: DA50mm f1.8 and DA35 mm f2. These three lenses are the fastest modern Pentax lenses. The FA Limited lens series are older lenses developed for full-frame era and cannot be considered modern although there are outstanding. Fast third party lenses (f1.4) include also old (but excellent) designs: CZ50mm f1.4, VL58mm f1.4,... albeit a very few newer ones (the Sigma Art series).
I believe that you meant that newer camera body can operate at higher ISO, those compensating low light conditions with higher ISO operation. This is very different IMHO with the usage of fast lenses. Fast lenses rely upon large aperture (low f), yielding unique optical qualities and shallow DOF.
Personally, when shooting in low light, I prefer to use large aperture/fast lenses over boosting the ISO. It is more difficult IMHO because of the shallow DOF but more rewarding. That is my own experience and I admit that others may have different opinions.
My 5 cents...