At highest typical print resolution of 300 dpi a 4x6 only needs
1200x1800. 3070x2048 is enough to make a pretty good 8x10 with 256 dpi.
The size of the files says that the JPEG compression is at a high
quality level. Some shops print at 300 but Mpix (and I assume) Miller's
print at 250. So the resolution should be more than acceptable. But
that doesn't say anything about the actual scan quality.
Chuck Norcutt
On 9/19/2011 1:45 AM, Wayne Harridge wrote:
> I just had a look at the files from my last film scan done by my local lab,
> images are 3070x2048 and file sizes (jpeg) vary from about 1MB up to 4MB
> depending on the image, so comparable to what you are seeing. The average
> punter probably only looks at the resolution (as they do for digital
> cameras) and doesn't notice clipping. My understanding is that the scans
> are only really of a quality for the lab to produce a set of "acceptable"
> looking 6"x4" prints. From my experience some of these scans are ok, but if
> I'm after something better I re-scan at home (Epson V700).
>
> ...Wayne
>
>
>>
>> New lab with first trial roll of Ektar returned with scans as jpegs
>> 3087X2048. Files are only 1.4-1.5MB or so. Previous scans were 6X9"
>> at 300dpi which came out
>> to 2728X1830---files were about 2MB. Something is rotten in Denmark.
>> Found some totally clipped red channel from a Zinnia shot. Ok, the
>> shot was perhaps 1/4 stop overexposed, but clipping the channel
>> already? They have less dust then before and more pixels but just
>> don't look right.
>> What is up? Are these waaaay over compressed? Why would they ever
>> bother with a HiRes scan if they ruin them with tiny Jpegs? Thought
>> I'd better check
>> here first though. I haven't had much time to scan in awhile but my
>> mediocre one at work seems better.
>>
>> Big Sigh, Mike
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