Pentax K-70 Performance


Timing and Performance

Good overall performance for its class.

Startup/Play to Record

Power on
to first shot

~1.0 second

Time it takes for camera to turn on and take a shot.

Play to Record,
first shot

~0.2 second

Time until first shot is captured.

The Pentax K-70's startup time was a little slow for a DSLR, but switching from Play to Record and taking a shot was quite fast.

 

Shutter Response (Lag Time), Optical Viewfinder

Full Autofocus
Single Area AF
(Center AF point)

0.126 second

Time from fully pressing shutter button to image capture. (All AF timing measured with a Pentax 35mm f/2.8 lens).

Full Autofocus
Single Area AF
Flash enabled

0.143 second

Time from fully pressing shutter button to image capture, Auto Flash enabled.

Manual focus

0.095 second

For most cameras, shutter lag is less in manual focus than autofocus, but usually not as fast as when the camera is "pre-focused."

Pre-focused

0.093 second

Time to capture, after half-pressing and holding shutter button.

Shutter Response (Lag Time), Live View mode

Pre-focused
Live View

0.272 second

Time to capture, after half-pressing and holding shutter button.

The Pentax K-70's full autofocus shutter lag when shooting the same target multiple times was faster than average for a consumer DSLR. The K-70 required only 0.126 second for full AF using the center focus point with a Pentax 35mm f/2.8 lens.  Enabling the flash raised shutter lag only slightly to 0.143 second, reflecting the added delay caused by the metering preflash. Manual focus shutter lag was even faster than autofocus as expected, at 0.095 second. When prefocused, shutter lag only dropped a bit to 0.093 second which is a tad slower than average for a consumer DSLR, but still quite responsive.

When prefocused in Live View mode, shutter lag was 0.272 second, which is not bad. We no longer test full AF lag in Live View mode, because contrast-detect AF speed tends to be very lens dependent for DSLRs.

To minimize the effect of different lens' focusing speed, we test AF-active shutter lag with the lens already set to the correct focal distance.

 

Cycle Time (shot-to-shot)

Single Shot mode
Large Best JPEG

< 0.3 second

Time per shot, averaged over a few frames (we no longer test for buffer depths in single-shot mode).

Single Shot mode
14-bit RAW + L/B JPEG

< 0.3 second

Time per shot, averaged over a few frames (we no longer test for buffer depths in single-shot mode).

Early shutter
penalty?

No

Some cameras refuse to snap another shot if you release and press the shutter too quickly in Single Shot mode, making "No" the preferred answer.

Continuous H mode
Large Best JPEG

0.17 second (6.06 frames per second);
47 frames total;
20 seconds to clear

Time per shot, averaged over 47 frame buffer, then slows to an average of 0.23 second or 4.35 fps when buffer is full.

Continuous H mode
14-bit RAW

0.17 second (6.06 frames per second);
11 frames total;
14 seconds to clear

Time per shot, averaged over 11 frame buffer, then slows to an average of 0.56 second or 1.79 fps when buffer is full.

Continuous H mode
14-bit RAW + L/B
JPEG

0.17 second (6.06 frames per second);
9 frames total;
16 seconds to clear

Time per shot, averaged over 9 frame buffer, then slows to an average of 1.11 seconds or 0.90 fps when buffer is full.

Flash recycling

2.3 seconds

Flash at maximum output.

*Note: Buffer clearing times measured with a SanDisk Extreme Pro 95MB/s UHS-I SDHC memory card. Slower cards will produce correspondingly slower clearing times. Slow cards may also limit length of bursts in continuous mode. ISO sensitivity and other settings such as highlight/shadow corrections or NR can also affect cycle times and burst mode performance.

Single-shot cycle times were so fast that they were difficult to accurately measure as they depend on the tester's dexterity and ability to maintain an optimum rhythm, so your results may vary. (Note that we no longer test single-shot mode with just RAW files, as the results are usually somewhere in between JPEG and RAW+JPEG.)

Continuous H mode speed was good at about 6.1 frames per second regardless of file type, just over Pentax's 6.0 fps spec. There is also a Continuous L mode rated at 3.0 frames per second, but we did not test that mode.

Buffer depth in Continuous H mode was very good when shooting just JPEGs at 47 Large Best Quality JPEG frames before the camera slowed, though with RAW files buffer depths were much shallower at 11 RAW frames or 9 RAW+L/B JPEG frames. This is typical of DSLRs in its price range, though. Also note that our test target was designed to be difficult to compress, so shooting typical subjects may yield deeper buffers.

Buffer clearing was sluggish even with our fast UHS-I SDHC card, taking 20 seconds to clear after a max-length burst of JPEGs, 14 seconds after a burst of RAW frames and 16 seconds after a max-length RAW+JPEG burst. The K-70 does however let you change settings, take additional shots or view just-shot photos while the buffer is clearing.

The K-70's built-in flash took an average of 2.3 seconds to recharge after full-power shots, which is quite fast.

Bottom line, the Pentax K-70's performance was generally good for its class in our tests. Startup was a little slow for a DSLR, but AF speeds were very fast, single shot cycle-times, burst speeds and flash recycle times were all good. Buffer depths with RAW files were somewhat shallow but that's not unusual for its class, however buffer clearing was on the slow side.

Battery

Battery Life
Poor battery life for a DSLR.

Operating Mode Number of Shots
Optical Viewfinder,
(CIPA standard)
410

The Pentax K-70 uses a custom rechargeable D-LI109 lithium-ion battery for power, and ships with a dedicated charger. Battery life when using the optical viewfinder is well below average for a DSLR, and Pentax does not specify battery life for Live View mode, which will certainly be a lot lower. We strongly recommend you pick up a spare battery and keep it freshly charged and on-hand for extended outings.

The table above shows the number of shots the camera is capable of (on either a fresh set of disposable batteries or a fully-charged rechargeable battery as appropriate), based on CIPA battery-life and/or manufacturer standard test conditions.

(Interested readers can find an English translation of the CIPA DC-002 standards document here. (180K PDF document))

 



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