Home

Please support mflenses.com if you need any graphic related work order it from us, click on above banner to order!

SearchSearch MemberlistMemberlist RegisterRegister ProfileProfile Log in to check your private messagesLog in to check your private messages Log inLog in

Bessa RF Velvia 100 Magenta cast removed
View previous topic :: View next topic  


PostPosted: Tue Nov 04, 2008 3:22 pm    Post subject: Reply with quote

Shocked
This is unbelevable great stuff from such a old cam !
Love those pictures Attila !

Cheers
Tobias


PostPosted: Tue Nov 04, 2008 3:45 pm    Post subject: Reply with quote

Thank you!


PostPosted: Wed Nov 05, 2008 2:19 pm    Post subject: Reply with quote

Maybe we isolted the magenta-cast problem:

http://www.apug.org/forums/forum40/55573-velvia-100f-other-photographers-experience.html

The experiences in the above forums are pretty similar to mine:

Velvia 50 - no problem at all (best Velvia film ever after the oiginal one now discontinued).

Velvia 100F - magenta casts depending on exposure or other random factors.

Velvia 100 - far less problems (but if I have to shot at 100 ISO I prefer Provia all the day).


PostPosted: Wed Nov 05, 2008 3:30 pm    Post subject: Reply with quote

A G Photography wrote:
Maybe we isolted the magenta-cast problem:

http://www.apug.org/forums/forum40/55573-velvia-100f-other-photographers-experience.html

The experiences in the above forums are pretty similar to mine:

Velvia 50 - no problem at all (best Velvia film ever after the oiginal one now discontinued).

Velvia 100F - magenta casts depending on exposure or other random factors.

Velvia 100 - far less problems (but if I have to shot at 100 ISO I prefer Provia all the day).



wow!!! My guess confirmed .... Thanks Alessandro -- VERY USEFUL INDEED!!!

tf


PostPosted: Tue Nov 18, 2008 6:45 am    Post subject: Magenta cast with Velvia 100F Reply with quote

trifox wrote:
A G Photography wrote:
Maybe we isolted the magenta-cast problem:

http://www.apug.org/forums/forum40/55573-velvia-100f-other-photographers-experience.html

The experiences in the above forums are pretty similar to mine:

Velvia 50 - no problem at all (best Velvia film ever after the oiginal one now discontinued).

Velvia 100F - magenta casts depending on exposure or other random factors.

Velvia 100 - far less problems (but if I have to shot at 100 ISO I prefer Provia all the day).



wow!!! My guess confirmed .... Thanks Alessandro -- VERY USEFUL INDEED!!!

tf


G'day folks.
I was the writer of that post referred to above re a magenta cast in Velvia 100F. I'm still researching it and am very interested in scouting about for as many experiences of others with 100F as I can, hence landing on this forum when I caught a tag from Google...

One possible culprit I am looking at is the use of a Hoya Super HMC Skylight 1B filter which, as you'll know, has a light pink tint to it. I have noted there is no magenta cast in images shot with a polariser. My experience in recent times is that early morning sun on brown-ish coastal sand actually came out with a quite bizarre reddish tinge. I doubt though the cast is caused by lens coatings but my next point of scrutiny will be quality control of the E6 lab which, having been "over-run" by the new-fangled digital dictum, doesn't fire it up very often and when it does, it's a 6 day turnaround. Just want to check if they monitor their chemicals... On occasion I've had a greenish-blue cast on RVP 50 which my printer has deftly cancelled out during the Ciba process. So, for now, I will be re-running the shoot at the beach with a UV(0) filter and new roll of 100F from a different batch, and see what happens...

PdJ
Australia.



Example of obvious magenta cast but note absence of any tint to the whites of the water. Some may say a magenta cast can be beneficial for sunrise (this pic) and/or sunset, but only if the effect is moderate. This image is a travesty of the actual lighting observed.


PostPosted: Tue Nov 18, 2008 9:26 am    Post subject: Re: Magenta cast with Velvia 100F Reply with quote

Poisson Du Jour wrote:
trifox wrote:
A G Photography wrote:
Maybe we isolted the magenta-cast problem:

http://www.apug.org/forums/forum40/55573-velvia-100f-other-photographers-experience.html

The experiences in the above forums are pretty similar to mine:

Velvia 50 - no problem at all (best Velvia film ever after the oiginal one now discontinued).

Velvia 100F - magenta casts depending on exposure or other random factors.

Velvia 100 - far less problems (but if I have to shot at 100 ISO I prefer Provia all the day).



wow!!! My guess confirmed .... Thanks Alessandro -- VERY USEFUL INDEED!!!

tf


G'day folks.
I was the writer of that post referred to above re a magenta cast in Velvia 100F. I'm still researching it and am very interested in scouting about for as many experiences of others with 100F as I can, hence landing on this forum when I caught a tag from Google...

One possible culprit I am looking at is the use of a Hoya Super HMC Skylight 1B filter which, as you'll know, has a light pink tint to it. I have noted there is no magenta cast in images shot with a polariser. My experience in recent times is that early morning sun on brown-ish coastal sand actually came out with a quite bizarre reddish tinge. I doubt though the cast is caused by lens coatings but my next point of scrutiny will be quality control of the E6 lab which, having been "over-run" by the new-fangled digital dictum, doesn't fire it up very often and when it does, it's a 6 day turnaround. Just want to check if they monitor their chemicals... On occasion I've had a greenish-blue cast on RVP 50 which my printer has deftly cancelled out during the Ciba process. So, for now, I will be re-running the shoot at the beach with a UV(0) filter and new roll of 100F from a different batch, and see what happens...

PdJ
Australia.



Example of obvious magenta cast but note absence of any tint to the whites of the water. Some may say a magenta cast can be beneficial for sunrise (this pic) and/or sunset, but only if the effect is moderate. This image is a travesty of the actual lighting observed.


Quoted so to show the image (because of the spam blocker PdJ).

I'm really curious about your finding, anyway I found out some magenta cast also in Velvia 50 if badly underexposed (more than 1 stop) and I also heard the same problem from other photographers here in Italy.


PostPosted: Tue Nov 18, 2008 9:55 pm    Post subject: Reply with quote

Alessandro ,

One point to note that while the cast was present under Skylight 1B filtration and not under polarisation (that is, POL exclusively, not piggybacked with 1B) is because a POL filter has a 'cooling' (blue) effect. The suggestion therefore is that the magenta hue is environmentally-influenced and the film, being red-sensitive, exaggerates it, just like that old chestnut Velvia 50 which is green sensitive and maxes out anything green.

Talking to a colleague this morning we touched on another, somewhat obscure subject of algal blooms on deposited salt in sand that react with sunlight and give rise to a very pink hue, often much loved by landscape photographers. Around 500km away we have a geological feature called "Pink Lakes" (dry saltwater lakes) where most nights in warmer weather the lakes literally glow vivid pink: a result of algal growth on salt crystals in the evaporated 'salt pans'.

Velvia 100F has delighted me on a 2006 trip to New Zealand with crisp, clear rendition (the rendition of whites and blues is marvellous) if a rather flashy, avant garde palette in hazy to bright sun. I'll continue to use it but watch for places where conditions may predispose to a magenta hue and change over to RVP 50 — or use a POL (not really suitable for ultra-wide angle landscape work).

Thanks for fixing up the photo; I was befuddled as to why it didn't show up! Smile

.:: PDJ ::.


Last edited by Poisson Du Jour on Tue Nov 18, 2008 10:18 pm; edited 1 time in total


PostPosted: Tue Nov 18, 2008 10:09 pm    Post subject: Reply with quote

Welcome to aboard!