Yeah cool. I usually meter for the scene and then if it is more than 1 second double the exposre to account for rep failure. You win some and you lose some! I usually timer on my phone if I have it with me or count in my head for like 3 or 4 seconds. You'll have to let me know the ebay seller as $8 a roll for velvia 50 is great! I'd love to get some of that.