How to Get Digital Photos Transferred to 35mm Slides
It’s really very simple and straightforward getting your digital photos transferred to 35mm slides, provided you prepare your digital photographs correctly beforehand. You don’t have to be a professional photographer to do this, so you can relax. I’m going to explain the process in simple terms so after reading this article you′ll be an expert!
Perhaps the most common question asked is “Can a digital camera produce a good enough image for a slide?” The answer is “Yes” near enough every digital camera available today will produce images that make great slides. Any camera with 2M pixels or more will produce a photo that will look better on a slide than on your computer monitor. For the best results you should use the highest resolution available on your camera.
Another common question asked is “Does the processor just take a photo of a computer monitor?” The answer to this question is “No!” The processing firm will use an extremely high resolution monochrome cathode ray tube called a ‘film recorder’, which has a lens, shutter and camera attached to it. The file containing your digital photo is sent to the recorder one colour element at a time. Once all three colour elements (red, green, blue) have been sent the image will have been captured on film. For 35 mm film the whole process takes only 30 to 90 seconds.
Most digital cameras capture photos in a different aspect ratio compared to a full frame slide. This means that if you leave your photos unedited your slides will have small black borders on their edges. So if you want your photo to fill the slide frame completely you’ll need to crop it with an aspect ratio of 2:3, which is the same aspect ratio as a 6 x 4 inch print. The actual aperture of most slide mounts is approximately 3840 x 2560 pixels, though this will vary depending upon the mount stock used. Clearly, if your images are sized to these dimensions the processor will not need to scale your photos to fully fit the slide frame.
Usually a processor will support many different file formats. However, it’s recommended that you use the most common format, which is high quality JPEG. The resolution of the file is not important as it’s the number pixels in the image that determine the quality of the finished slide. For the best quality slides an image resolution of 1800 x 1200 pixels or more is recommended. In any case, it’s not advisable to go lower than 800 x 600 pixels unless there’s no fine detail in the image. The absolute optimum resolution for 35mm slides is the one set up for the film recorder, which is generally 4k or 4096 x 2732 pixels.
The final step is getting your files to the processor. Many online processors have a facility where you can FTP your JPEG files directly to them. Alternatively you can provide your files saved on your camera’s memory card or transferred onto a floppy disk or CD-ROM. If you have a large number of images it is usually acceptable to archive them in a ZIP file or similar.
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