Hasselblad X2D Digital Camera - Front Left
Different file formats are available for capturing images, with RAW and JPEG being the most common. The choice between formats depends on factors like photo use and desired control in post-processing. Here’s an explanation of RAW vs. JPEG images, focusing on high-end 35mm superior results with medium format cameras.
High-end 35mm cameras capture RAW and JPEG images together. This lets photographers quickly share or preview processed JPEG files while keeping high-quality RAW files for later detailed editing if needed.
Typically, when viewing a print from a standard distance of about 12 inches (30 cm), people consider a resolution of around 300 pixels per inch (PPI) adequate.
For a 16×20 print, the longest side would be 20 inches. At 300 PPI, the required pixel dimensions would be 6000 pixels (20 inches x 300 PPI = 6000 pixels). Since our scanned image has a maximum width of 4000 pixels, enlarging it to 16×20 inches would result in some loss of resolution and potential distortion.
Similarly, for a 20×24 print, the longest side would be 24 inches. At 300 PPI, the required pixel dimensions would be 7200 pixels (24 inches x 300 PPI = 7200 pixels). Again, the maximum width of our scanned image is 4000 pixels, which would result in a significant loss of resolution and potential distortion when enlarged to 20×24 inches.
A 645 format camera is a medium format camera that captures images on a more significant film or sensor than a 35mm camera. The term “645” represents the approximate dimensions of the image frame, which is 6 centimeters by 4.5 centimeters. On the other hand, a 35mm camera captures images on a film or sensor that measures 36mm by 24mm.
Here are a few reasons why a 645 format camera can produce better imagery up to a 20×30 inch print compared to a 35mm camera:
The 645 format camera generally offers better image quality and resolution but has a larger size and weight, higher cost, and demands specialized lenses and accessories. When choosing an image intended to be enlarged considerably, such as for billboards, these factors should be considered.
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