Print Swap vs ShutterDoc

Photographers and visual artists surround themselves with work that moves them. Print Swap lets you build that collection through exchange rather than commerce. Browse gallery-quality prints, find work you'd hang, and swap with the artist who made it. HOW IT WORKS 1. Upload your work and set your print specifications 2. Browse prints from artists around the world 3. Save pieces you love to revisit later 4. Propose a swap when you find work you'd trade for 5. When both artists agree, prints are professionally produced and shipped 6. You pay only for printing and shipping, no subscriptions, no hidden fees KEY FEATURES - Upload directly or import from Google Drive, Dropbox, or iCloud - Browse and discover work from artists worldwide - Save pieces you love with a single tap - Propose and manage swaps in-app - Secure payment processing via Stripe - Gallery-quality prints, professionally produced and shipped WHO IT'S FOR Print Swap is for photographers and visual artists who want to exchange work with peers. Whether you're building a collection from artists you've met online, or swapping with someone whose style complements yours, this is the place to do it. A direct exchange between artists who admire each other's work. GALLERY-QUALITY PRINTS Every swap is produced to professional standards. Choose from a range of papers and sizes. Your work is printed and shipped directly to the other artist, and the same goes for what you receive. Real prints, made to last. PAYMENT Free to download. You pay only when you complete a swap, covering print production and shipping. Browse and save as much as you like at no cost. Your work deserves a wall, not just a screen. Download Print Swap and upload your first piece today.

Measure what your film camera's shutter is actually doing. ShutterDoc measures shutter speeds in ordinary room light. Take the lens off, open the back, point the phone into the mount and fire. A run from 1/30 to 1/500 on an SLR, three firings a speed, takes about two minutes. A test roll costs you the film, the developing and a fortnight of waiting, and still leaves you guessing which speed was off. You can also detect shutter capping for speeds up to 1/1000th of a second. WHAT IT DOES Measures speeds from 1 second to 1/500, on focal-plane shutters, so most SLRs and rangefinders, and on leaf shutters, so folders, TLRs and fixed-lens compacts. Separate guidance for each. Detects shutter capping. It maps the exposure across the whole film gate and finds bands that received little or no light, on horizontal and vertical shutters alike. Puts a confidence on every reading, and says when conditions will not support a number you can trust. Keeps a library of your cameras, with shutter type, flash sync and notes, tested or not, and saves every session so a body can be compared over time. Exports readings and capping maps as CSV, for a repairer or a buyer. Walks you through the setup the first time you open it. WHAT IT IS FOR Buying: The seller says the speeds sound about right. Check before the money changes hands, at a flea market or across a cafe table. Shooting: An old leaf shutter can be well off its markings at the slow end. Measure it once and expose for the real number rather than the marking. Selling: Show a buyer the numbers rather than asking them to take your word for it, and put the export in the listing. A shelf of them: Work through the bodies you never tested and find out which are honest. Servicing: Test it, send it off, test it again, keep both sessions. CAPPING DETECTION At fast speeds a focal-plane shutter exposes the frame through a moving slit. If the curtains drift out of step the slit closes partway across and a band of every photograph receives nothing. Rest the camera on a tripod, fire about ten times one speed, and ShutterDoc averages them into one map of the light across the gate. It answers in one of four words, even, uneven, unsure or capping, and says unsure rather than picking the nearest when the evidence will not carry one. ACCURACY Verified against a phototransistor rig built for the purpose, on a Nikon FE, Minolta X-370, Canon EOS-1N, Kiev 19, Kodak Retina and Tele-Rolleiflex: horizontal and vertical focal-plane, and leaf. 1 second to 1/30: typically within 5% of true speed. Leaf shutters: typically within 0.15EV as far as 1/125. Focal plane at 1/125 and 1/250: usually within 0.3EV. 1/500: usually within 0.5EV, almost always within 0.6EV. Handheld is fine at 1/60 and below, which is what quick test mode is built for. Above that you want a constant, diffused light source, a monitor at full brightness or a wall with indirect sun on it, and a tripod if you have one. The app explains the setup and carries the full table. WHAT YOU NEED An iPhone that shoots 240fps slow motion. A camera whose lens comes off and whose back opens, with no film in it. Fixed-lens leaf-shutter cameras work too, at their widest aperture. A bright wall or a monitor at max brightness is enough light. HOW IT WORKS The phone films the shutter at 240 frames a second and adds up the light that reached the film gate, which is what your film would have received. Measuring light rather than timing an event is what resolves an exposure shorter than one frame. PRIVACY Your video is never uploaded. The measurement runs entirely on your phone. No account, no sign-in, no tracking. LIMITS ShutterDoc does not replace a workshop-grade tester, and small changes in lighting or filming angle can move a fast reading. Published accuracy results come from internal testing under controlled conditions, and your own may differ with your camera and your light. Get in touch if something is not working.