What is Reciprocity Failure or Reciprocity Law failure ? :dunno:
Maybe the gurus here can explain....
Many thanks
Maybe the gurus here can explain....
Many thanks
Originally posted by darkavgr
What is Reciprocity Failure or Reciprocity Law failure ? :dunno:
Maybe the gurus here can explain....
Many thanks
Originally posted by Kit
I read somewhere that this only kicks in after 30secs?
Originally posted by Kit
I read somewhere that this only kicks in after 30secs?
Originally posted by darkavgr
Ian & ck,
So for night shots...do I need to compensate ?
so far, I've been following the exposure values per camera.
Originally posted by Kit
I don't see the need for compensating. Hardly, if any at all where I used an exposure of more than 15 secs. With Fuji Velvia that is.
Originally posted by NitroTech
Have you experienced this before? With Velvia i mean.... When i use it for long exposures (6 secs and above) the picture always comes out greenish. But for Provia 100 and 400 i have no such problem.
Originally posted by Kit
Hmmm..... nope. Haven't noticed that on my slides.
Originally posted by NitroTech
Have you experienced this before? With Velvia i mean.... When i use it for long exposures (6 secs and above) the picture always comes out greenish. But for Provia 100 and 400 i have no such problem.
Originally posted by ckiang
That's NOT reciprocity failure,
Regards
CK
Sorry that's not right. It is a reciprocity failure issue. Velvia's spec sheet states that you need to use magenta filtration when shooting longer than 4 sec. I read that it's because of the uneven response of the different colour layers beyond 4sec.Originally posted by ckiang
That's NOT reciprocity failure, that's a colour balance issue. The slide is daylight balanced, and the greenish cast you get is probably from some artificial lighting, notably flourescent.[/B]