Quick question that I can't seem to find definitive answer on google...

[68lbs]

Am I right in thinking that f/1.4 is 2/3 stop larger than f/1.8 ???

 

[V8burble]

Hope this is correct...

Typical one-third-stop f-number scale
f/# 1.0 1.1 1.2 1.4 1.6 1.8 2 2.2 2.5 2.8 3.3 3.5 4 4.5 5.0 5.6 6.3 7.1 8 9 10 11 13 14 16 18 20 22


OR yes, you are correct 68lbs, would have been quicker I guess

 

[68lbs]

Thanks Burble

I prefer your longer answer. I almost asked if anyone had a 'scale' as I feel I should know this sort of info