2. Choose Size priority or Optimal quality. Figure 3-13
shows Optimal quality as the selected compression type.
3. Press the OK button to choose the compression type.
My Recommendation: I normally use Optimal quality when
I shoot JPEGs since the whole JPEG concept is one of lossy
image compression and I don’t want the potentially heavier
compression of Size priority to lower the image quality. Size
priority just adds more potential lossiness, so I tend to avoid
it. The only time I use Size priority is when I’m shooting
what I call “party pics”. When I’m at a party shooting
snapshots of friends having a good time, I’m not creating fine
art and will never make an enlargement greater than an 8 × 10
inches (20 × 25 cm). In that case, I don’t worry about extra
compression. In fact, I might just welcome it to avoid storing
larger-than-needed images on my computer’s hard drive.
Using Size priority lets the camera use maximum
compression to maintain its published JPEG compression
ratios (fine = 1:4, normal = 1:8, and basic = 1:16). Your
images may not have those precise compression ratios while
using Optimal quality—especially with complex, detailed
subjects.
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