Reid said:got some evidence back from Fuji (OK you digital lot, so it takes weeks :-) ) Ist roll of 100ASA
Velvia anyway (yes, thats f - i - l - m). I think I will be using it in future.
Currently experimenting with Astia. Not claimed to be as sharp as Velvia, but I'm wondering how much
that has to do with the lower contrast. High contrast tends to make an image look sharper, so I
wonder how they actually measure sharpness. In the Fuji Data Guide, the "resolving power" mentions
"chart contrast", which makes me wonder if boosting the contrast would actually boost sharpness (or
apparent sharpness). I like the lower contrast of Astia, since it's closer to digital and allows me
more leeway in post-processing, but I'd end up boosting the contrast for the final result. More on
film below.
Quoted message said:"fellwalk.co.ukscafell2.htmOpen ↗"
Very nice, rocky, barren, lichens. Good low light giving interesting relief.
Quoted message said:"fellwalk.co.ukwaspic350.htmOpen ↗"
Very pretty, nice crop. A slight pity that the tops of the trees touch the background shadow.
Quoted message said:"fellwalk.co.ukwaspic370.htmOpen ↗"
Good, well-balanced composition. Although I don't normally like man-made stuff in a photo, the fence
posts in the foreground make the picture. Very well composed. But are some of those fence-posts
overexposed? Or did that happen during post-processing?
Quoted message said:"fellwalk.co.ukwaspic340.htmOpen ↗"
Very nice minimalist composition, and again a nice crop. I'd like to have seen a little bit more
water on the left hand side of the shot though.
Quoted message said:"fellwalk.co.ukwaspic360.htmOpen ↗"
Not overly keen on this one, but nice low light and diagonals. Perhaps this could do with a teeny
bit of extra saturation to lift the colours? It looks a bit dull for morning colours.
Fuji Data
***********
Granularity
Provia: 8 (highest standard of grain quality in the ISO 100 class) Velvia: 9 (extremely fine grain)
Astia: 10 (very fine grain)
Resolving Power (Chart Contrast 1.6:1 - 1000:1)
Velvia: 80-160 lines/mm (high sharpness) Provia: 60-140 lines/mm (highest standard of sharpness in
the ISO 100 class) Astia: 55-135 lines/mm (enhanced sharpness)
I'm still not sure of the relationship between grain and sharpness. I used to think that finer grain
equalled greater sharpness, so why is Velvia sharper than Provia if Provia has the finest grain? Is
it to do with the way sharpness (resolving power) is measured? What does "chart contrast" mean
exactly? Is the resolving power a measure of sharpness or of contrast, or both? Perhaps it's not a
coincidence that Velvia is rated as being the sharpest, since it's the most contrasty. Perhaps
sharpness is defined by contrast? In which case, wouldn't boosting the sharpness on Astia change the
numbers above?
FUJICHROME VELVIA 50 Professional-quality, medium-speed, daylight-type reversal film with extremely
fine grain, high sharpness and enhanced colors. Suited to landscape photography and commercial uses
such as fashion, product and advertising photography, and the production of greatly enlarged high-
quality printed material such as posters, etc. Provides the highest sharpness of all FUJICHROME
films along with full gray scale response, greatly improved color reproduction, enhanced feeling of
depth and high suitability for pushprocessing up to one stop.
FUJICHROME PROVIA 100 Professional-quality, medium-speed, daylight-type color reversal film with the
highest standard of grain quality and sharpness in the ISO 100 class. Suited to a wide range of
photographic work, making it ideal for commercial, fashion, portrait and landscape applications.
Provides exceptionally fine grain equalling that of ISO 25-50 film, vivid color reproduction, rich
tones and well-controlled gradation balance, has improved reciprocity characteristics and maintains
high image quality even when push-/pull-processed.
FUJICHROME ASTIA 100 Professional-quality, medium-speed, daylight-type color reversal film with very
fine grain, enhanced sharpness and high image quality for universal applications. Suited
particularly to fashion photography, but also excellent for commercial and other photographic
applications where original images are intended for reproduction by printing. Provides beautiful
skin tones, faithful color reproduction, rich tone reproduction, enhanced color temperature-related
characteristics and good push-/pull-processing (minus one-half to plus one stop) suitability.
Paul
--
The October Project 2003
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