I have some of each lounging in the fridge.

I wouldn't expect these to touch Velvia 50 - but I'm surprised at the all the good buzz about Provia 400.

Would all the added speed, DOF and hand-held convenience be negated by the lower image quality?

If the final image of high speed MF isn't much better than lower speed 35mm, then I would only be getting an extra workout lugging the larger camera.

On 9/15/2010 9:21 PM, lattie_smart wrote:

> I have some of each lounging in the fridge.
>
> I wouldn't expect these to touch Velvia 50 - but I'm surprised at the
> all the good buzz about Provia 400.
>
> Would all the added speed, DOF and hand-held convenience be negated
> by the lower image quality?

Absolutely not. I have some Provia 400X and use it where I need it
without concern or fear of the resulting image quality. It is only a
tiny bit grainer than my usual Provia 100F and no worse than Provia 100F
pushed one stop.

Yesterday, for example, I took the day off work and shot some more
images under the ice. Using 400 speed film brought my exposure times
down to 1/2 and 1 second. The images would have been un-obtainable
without the 400 speed film.

John Thurston
Juneau, Alaska

I got my first Provia 400x roll back of RenFest characters shot w/ a TL-120. It does has some wonderful color and contrast and the Kodachrome comparisons are apt.

All the sharp patterning, textures and details seem to be there in those bright, intricate costumes. But I think I noticed some graininess in the flesh tones - where grain size meets psychological conditioning.

I have yet to send out another roll of the same event shot on 100F pushed to 200 - for comparison purposes.

--- In MF3D-group@yahoogroups.com, John Thurston wrote:
>
> On 9/15/2010 9:21 PM, lattie_smart wrote:
> > I have some of each lounging in the fridge.
> >
> > I wouldn't expect these to touch Velvia 50 - but I'm surprised at the
> > all the good buzz about Provia 400.
> >
> > Would all the added speed, DOF and hand-held convenience be negated
> > by the lower image quality?
>
> Absolutely not. I have some Provia 400X and use it where I need it
> without concern or fear of the resulting image quality. It is only a
> tiny bit grainer than my usual Provia 100F and no worse than Provia 100F
> pushed one stop.
>
> Yesterday, for example, I took the day off work and shot some more
> images under the ice. Using 400 speed film brought my exposure times
> down to 1/2 and 1 second. The images would have been un-obtainable
> without the 400 speed film.
>
> John Thurston
> Juneau, Alaska
>

400x isn't too far off K64, according to the RMS values I googled up recently:

> 400x isn't too far off K64, according to the RMS values I googled up recently:

each RMS incremental value, like in all photographic expressions,
equals 2x or 1/2 the previous value. So 400x has 4x (2 x 2) the grain size of K64.
This is dimensional...for grain area size, multiply by about 3x, so 12x larger area for
400x. Of course, this is all tested in a lab...how our eyes react brings other variables
into play, such as the quality of the viewing lenses, brightness of back light, type of
diffuser used, color of subjects (some colors express grain more than others), acuity of
our eyes, etc.

I would think Astia 100F would show much less grain than Velvia 100, but for some reason,
I consider them equal under 5x mag.

This is for chrome film, neg film is expressed using a different set of values /
procedures...

b

>
> Astia 100F... RMS 7
> Velvia 100/100F... RMS 8
> Sensia 100... RMS 8
> Velvia 50R... RMS 9
> Kodachrome 25... RMS 9
> Kodachrome 64... RMS 10
> 400X... RMS 11
> 400F... RMS 13
> Kodachrome 200... RMS 16
>
> Didn't look up the Ektas and others.
>
> LeRoy
>
> On Tue, Oct 19, 2010 at 8:01 AM, lattie_smart <lattie_smart@yahoo.com
> lattie_smart@yahoo.com>> wrote:
>
> I got my first Provia 400x roll back of RenFest characters shot w/ a TL-120. It does
> has some wonderful color and contrast and the Kodachrome comparisons are apt.
>
> All the sharp patterning, textures and details seem to be there in those bright,
> intricate costumes. But I think I noticed some graininess in the flesh tones - where
> grain size meets psychological conditioning.
>
> I have yet to send out another roll of the same event shot on 100F pushed to 200 - for
> comparison purposes.
>
> --- In MF3D-group@yahoogroups.com , John Thurston
> wrote:
> >
> > On 9/15/2010 9:21 PM, lattie_smart wrote:
> > > I have some of each lounging in the fridge.
> > >
> > > I wouldn't expect these to touch Velvia 50 - but I'm surprised at the
> > > all the good buzz about Provia 400.
> > >
> > > Would all the added speed, DOF and hand-held convenience be negated
> > > by the lower image quality?
> >
> > Absolutely not. I have some Provia 400X and use it where I need it
> > without concern or fear of the resulting image quality. It is only a
> > tiny bit grainer than my usual Provia 100F and no worse than Provia 100F
> > pushed one stop.
> >
> > Yesterday, for example, I took the day off work and shot some more
> > images under the ice. Using 400 speed film brought my exposure times
> > down to 1/2 and 1 second. The images would have been un-obtainable
> > without the 400 speed film.
> >
> > John Thurston
> > Juneau, Alaska
> >
>
>
>