riker said:
ahsanford said:
I'll continue my vigil. I actually picked up a 35mm f/2 IS USM recently, and other than the little "35mm" written on the side, it's perfect.
In all honesty, I want a compact / quick / sharp 50 prime in that 35mm housing. I'll accept f/2 if that's what it takes, but it must have USM. In fact, my frequently posted picture asking Canon to make the lens for us is actually a PS'd 35mm f/2 IS.
- A
I'm a fan of the 35/2 IS and I totally understand what u are saying, but I still need to argue. The 35/2 IS is clearly a bigger and heavier lens than the current 50/1.4.
I do NOT want the 50/1.4 to get any bigger or heavier! Not even by 10g! After 20 years of tech development, the only way it is allowed to go is smaller/lighter. Everyone is so fan of the 50/1.4 but noone seems to realise that it's most important value aside being f/1.4 is the size and weight.
...
Hi riker!
I can understand you but I think I'll have to add something to your opinion. Because 20 years of tech development cannot change the laws of optical physics.
I think there are two major points of critique with the old 50/1.4:
1. mechanical built
2. optical quality
While #1 could probably be solved without making the lens bigger it could become heavier.
If Canon didn't use a lot of expensive high tech plastics or carbon fiber better mechanical built leads to higher weight.
But #2 is the sticking point. The optical formula is not only 20 years old but much older.
Even if you stay with the Double Gauss design better coatings and quality control won't help much here.
The trend is that the front element becomes a little bit bigger so you have less corner and edge distortion.
Even if you use expensive DO tech this wouldn't help much with a standard focal length.
So if you want to improve this lens optically it has to become (slightly) bigger and heavier.
IMO Canon shouldn't built a Sigma 50/1.4 Art pendant, but increase the overall performance of the recent lens.
If you don't like that, buy the recent lens or change to MFT where you can use a 25 mm lens

http://www.olympus.co.uk/site/en/c/lenses/om_d_pen_lenses/m_zuiko_premium/m_zuiko_digital_25mm_118/index.html
Disclaimer: Sorry for hijacking this 50 mm Macro thread with the 50/1.4 topic. but I couldn't leave this unanswered. I'll end here with that.