Silverlog Flash vs PicResize

Silverlog Flash calculates flash exposure using guide numbers — the fundamental relationship between flash power, distance and aperture. HOW IT WORKS Choose what to solve for and enter the other two values. Find the aperture for a given flash-to-subject distance, the maximum distance for a given aperture, or the guide number from a known distance and aperture. Adjust ISO to see how sensitivity affects your working range. FEATURES • Guide number to aperture calculation • Guide number to maximum distance calculation • Guide number from distance and aperture • ISO adjustment • Metric and imperial distance units • Works offline — no internet connection needed • Clean, focused interface • Dark mode support USEFUL FOR • Manual flash photography without TTL • Working out flash-to-subject distance for off-camera flash • Understanding your flash's effective range at different apertures • Film photographers using manual flash units Part of the Silverlog photography toolkit. No account required. No data collected.

Photo or ID photo the wrong size? Resize any image to exactly the dimensions you need in just a few steps. Lock the aspect ratio and the other side updates automatically as you type, so you land on a compliant size fast — or turn on Crop and drag the box to choose exactly what to keep, up to the full original size. Export as JPG or PNG, with adjustable JPG compression quality, so you can keep images sharp while staying in control of file size. Everyday edits, ID photos, cropping a shot, or resizing before you upload — all done in seconds. Highlights Custom image resolution Lock aspect ratio to prevent distortion Crop freely — drag the box to choose the area to keep Export as JPG or PNG Adjustable JPG compression quality Save straight to your photo library — simple and direct, no limits