How to Choose a Camera Rain Cover for Outdoor Shoots
By Borge's Imaging — Shop Photography, Printing and Studio Gear in Melbourne Borge's Imaging | Published: 2026-10-20
Category: Tips & Care
Learn how to pick the right rain cover for your camera based on lens size, weather conditions, and portability needs. Includes tips on fit, features, and trade-offs.
Quick answer
Choose a camera rain cover that matches your lens length, seals against moisture and dust, and packs small enough to carry on every shoot. The Think Tank Emergency Rain Cover line offers seam-sealed protection in three sizes for different setups.
Size matters: matching the cover to your lens
A rain cover that is too small won't protect your camera body or lens, while one that is too large can be clumsy and block access to controls. The key measurement is the lens length when attached to the camera. For a standard zoom or prime lens, a small cover usually fits. For a telephoto zoom like a 70-200mm, a medium cover works. For super-telephoto lenses such as a 150-600mm or 400mm f/2.8, you need a large cover that accommodates the extended barrel and hood.
Think Tank's Emergency Rain Covers are sized specifically for these categories. The Small fits compact DSLR or mirrorless cameras with a standard zoom, the Medium handles a 70-200mm f/2.8 setup, and the Large covers cameras with lenses up to 600mm f/4. Choosing the wrong size compromises protection or usability.
Seam-sealed vs. water-resistant: what the difference means
Not all rain covers are equal. A water-resistant cover may keep light drizzle off, but in a downpour or dusty environment, moisture and fine particles can seep through unsealed seams. Seam-sealed construction, like the Think Tank Emergency Rain Cover line, bonds the fabric at every joint so water and dust have no entry point. This makes a real difference if you shoot in heavy rain, near waterfalls, or in desert conditions.
The trade-off is that seam-sealed covers are often less breathable and may cost a bit more. For occasional light mist, a basic water-resistant cover might suffice. For reliable protection in unpredictable weather, seam-sealed is the safer choice.
Portability and deployment speed
A rain cover is only useful if you have it with you and can put it on quickly. Look for a cover that compresses into a compact pouch that fits in a pocket or small bag compartment. Think Tank's Emergency Rain Covers fold into an included carrying pouch, making them easy to stash in a camera bag without taking up much space.
Deployment speed matters when a sudden shower hits. Covers with a cinchable sleeve or drawstring closure let you slip them over the camera and tighten in seconds. If the cover is bulky or requires assembly, you might hesitate to use it, and your gear gets wet.
Decision rules for choosing a camera rain cover
- Match the cover to your lens length: Measure your lens when attached to the camera, including the hood. Small covers fit standard zooms, medium covers fit 70-200mm lenses, large covers fit super-telephotos up to 600mm. Check the manufacturer's lens compatibility list before buying.
- Prioritize seam-sealed construction for heavy weather: If you shoot in rain, snow, or dusty environments, choose a cover with sealed seams to block moisture and fine particles. Basic water-resistant covers are fine for light drizzle. Seam-sealed covers cost more but offer reliable protection in harsh conditions.
- Consider portability and quick deployment: Look for a cover that folds into a compact pouch and can be put on in seconds. Covers with cinchable sleeves or drawstrings are fastest to deploy. A cover that is easy to carry and quick to use is more likely to be used.
- Check for clear window and control access: An oversized window lets you see the LCD and settings. Ensure the cover does not block buttons, dials, or the viewfinder. Test the cover with your camera and lens before heading out.
Product facts
- Think Tank Emergency Rain Cover - Medium: Seam-sealed for extreme protection in downpour or dusty conditions; compresses into an included compact carrying pouch; oversize window to view LCD and controls. This medium cover suits a 70-200mm f/2.8 setup and provides reliable weather sealing plus easy access to camera controls.
Think Tank Emergency Rain Cover - Medium - Think Tank Emergency Rain Cover - Small: Seam-sealed for extreme protection in downpour or dusty conditions; compresses into an included compact carrying pouch; oversize window to view LCD and controls. The small size is ideal for compact cameras or standard zooms, offering the same protection in a lighter, more packable package.
Think Tank Emergency Rain Cover - Small
Who this is for
Best for
- Photographers who shoot outdoors in unpredictable weather
- Wildlife and sports photographers using long telephoto lenses
- Travel photographers who need a compact, packable rain solution
Not ideal for
- Studio or indoor photographers who rarely face rain or dust
- Photographers who need a hard-shell or underwater housing for submersion
