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Pentax 30239 Cable Switch CS-310 for K-70 Digital SLR — main product image
Pentax 30239 Cable Switch CS-310 for K-70 Digital SLR
Pentax 30239 Cable Switch CS-310 for K-70 Digital SLR
Pentax 30239 Cable Switch CS-310 for K-70 Digital SLR
Pentax 30239 Cable Switch CS-310 for K-70 Digital SLR
Pentax 30239 Cable Switch CS-310 for K-70 Digital SLR
Pentax

Pentax 30239 Cable Switch CS-310 for K-70 Digital SLR

★★★★★4.2 (12 reviews)

A dedicated wired shutter release for the Pentax K-70 that eliminates camera shake during long exposures and macro work.

$47.93*$49.00Save 2%
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Pentax Cable Switch CS-310 is a wired remote shutter release designed specifically for the Pentax K-70 Digital SLR. It connects via the camera's microphone/cable release terminal and provides a physical shutter button at the end of a 3.5-foot cable, allowing photographers to fire the shutter without touching the camera body. This is particularly valuable for long exposure photography, macro shooting, and any tripod-based work where even the slightest camera movement can result in a soft image.

The CS-310 requires no batteries, wireless pairing, or configuration—simply plug it in and shoot. Its straightforward design makes it one of the most reliable ways to trigger the K-70 remotely. The cable switch supports bulb mode operation, letting photographers hold the shutter open for extended exposures without maintaining continuous pressure on the camera's built-in shutter button. While it lacks advanced features like interval timing or delay programming, its simplicity is its strength for photographers who need dependable, vibration-free shutter control.

Key Features

Attaches to the Pentax K-70 or KP microphone terminal

One-metre-long cable switch

Helps prevent camera shake when using a macro or telephoto lens

Since it allows the user to release the camera’s shutter without touching it.

Pentax

Specifications

Brand
Pentax
Model
30239 (CS-310)
Function
Remote Shutter Release
Cable Length
3.5 feet (approximately 1 meter)
Connection
Microphone/Cable Release Terminal
Compatibility
Pentax K-70 Digital SLR

Pros & Cons

👍 Pros

  • Eliminates camera shake caused by pressing the shutter button directly, improving sharpness in long exposures
  • Simple plug-and-play connection with no batteries or pairing required
  • 3.5-foot cable length provides comfortable working distance from the camera
  • Lightweight and easy to pack in a camera bag

👎 Cons

  • Compatible only with Pentax cameras that use the microphone/cable release terminal, limiting cross-body use
  • 3.5-foot cable length may be too short for some studio or wildlife setups where greater distance is needed
  • No interval timer or programmable features—strictly a manual shutter release
  • Wired connection means you must stay within cable reach of the camera

Frequently Asked Questions

It plugs into the K-70's microphone/cable release terminal, which doubles as the wired remote port on this camera model.
Yes, you can press and lock the shutter button on the CS-310 to hold the shutter open for bulb exposures without maintaining finger pressure on the camera.
It is designed and marketed for the Pentax K-70. Compatibility with other Pentax models depends on whether they share the same 3.5mm cable release terminal—check your camera's specifications before purchasing.
The CS-310 cable is 3.5 feet (approximately 1 meter) long, giving you enough distance to trigger the shutter without being directly behind the camera.

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