Pentax 645Z vs Pentax RZ18
49 Imaging
80 Features
74 Overall
77
92 Imaging
39 Features
37 Overall
38
Pentax 645Z vs Pentax RZ18 Key Specs
(Full Review)
- 51MP - Medium format Sensor
- 3.2" Tilting Display
- ISO 100 - 204800
- No Anti-Alias Filter
- 1920 x 1080 video
- Pentax 645AF2 Mount
- 1550g - 156 x 117 x 123mm
- Announced April 2014
- Older Model is Pentax 645D
(Full Review)
- 16MP - 1/2.3" Sensor
- 3" Fixed Display
- ISO 80 - 6400
- Sensor-shift Image Stabilization
- 1280 x 720 video
- 25-450mm (F3.5-5.9) lens
- 178g - 97 x 61 x 33mm
- Announced September 2011
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Here, we are evaluating the Pentax 645Z versus Pentax RZ18, one is a Pro DSLR and the other is a Small Sensor Superzoom and they are both sold by Pentax. There is a huge difference between the sensor resolutions of the 645Z (51MP) and RZ18 (16MP) and the 645Z (Medium format) and RZ18 (1/2.3") boast different sensor sizing.
President Biden pushes bill mandating TikTok sale or banThe 645Z was introduced 2 years after the RZ18 which is quite a significant gap as far as tech is concerned. Both of the cameras feature different body design with the Pentax 645Z being a Large SLR camera and the Pentax RZ18 being a Compact camera.
Before diving right into a in depth comparison, here is a brief view of how the 645Z scores against the RZ18 in regards to portability, imaging, features and an overall score.
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Below is a sample of the gallery pics for Pentax 645Z and Pentax Optio RZ18. The whole galleries are provided at Pentax 645Z Gallery and Pentax RZ18 Gallery.
Reasons to pick Pentax 645Z over the Pentax RZ18
| 645Z | RZ18 | |||
|---|---|---|---|---|
| Announced | April 2014 |  | September 2011 | More modern by 32 months |
| Display type | Tilting |  | Fixed | Tilting display |
| Display size | 3.2" |  | 3" | Larger display (+0.2") |
| Display resolution | 1037k |  | 460k | Clearer display (+577k dot) |
Reasons to pick Pentax RZ18 over the Pentax 645Z
| RZ18 | 645Z |
|---|
Common features in the Pentax 645Z and Pentax RZ18
| 645Z | RZ18 | |||
|---|---|---|---|---|
| Focus manually |  | Very exact focus | ||
| Selfie screen |  | Lacking selfie screen | ||
| Touch display |  | Lacking Touch display |
Pentax 645Z vs Pentax RZ18 Physical Comparison
For anyone who is aiming to carry around your camera often, you're going to have to take into account its weight and size. The Pentax 645Z offers physical dimensions of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") and a weight of 1550 grams (3.42 lbs) whilst the Pentax RZ18 has specifications of 97mm x 61mm x 33mm (3.8" x 2.4" x 1.3") and a weight of 178 grams (0.39 lbs).
See the Pentax 645Z versus Pentax RZ18 in the new Camera with Lens Size Comparison Tool.
Take into account, the weight of an Interchangeable Lens Camera will vary dependant on the lens you have at that time. The following is a front view scale comparison of the 645Z versus the RZ18.
Considering size and weight, the portability score of the 645Z and RZ18 is 49 and 92 respectively.
Pentax 645Z vs Pentax RZ18 Sensor Comparison
Oftentimes, it can be hard to visualize the contrast between sensor sizes only by looking at specifications. The image here may give you a better sense of the sensor dimensions in the 645Z and RZ18.
Plainly, both cameras come with different resolutions and different sensor sizes. The 645Z having a larger sensor is going to make achieving shallow DOF simpler and the Pentax 645Z will resolve greater detail using its extra 35MP. Greater resolution can also enable you to crop images a good deal more aggressively. The more recent 645Z should have an advantage when it comes to sensor tech.
Pentax 645Z vs Pentax RZ18 Screen and ViewFinder
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Pentax 645Z vs Pentax RZ18 Specifications
| Pentax 645Z | Pentax Optio RZ18 | |
|---|---|---|
| General Information | ||
| Brand | Pentax | Pentax |
| Model type | Pentax 645Z | Pentax Optio RZ18 |
| Type | Pro DSLR | Small Sensor Superzoom |
| Announced | 2014-04-15 | 2011-09-12 |
| Physical type | Large SLR | Compact |
| Sensor Information | ||
| Chip | PRIME III | - |
| Sensor type | CMOS | CCD |
| Sensor size | Medium format | 1/2.3" |
| Sensor dimensions | 44 x 33mm | 6.08 x 4.56mm |
| Sensor surface area | 1,452.0mm² | 27.7mm² |
| Sensor resolution | 51 megapixels | 16 megapixels |
| Anti alias filter | ||
| Aspect ratio | 4:3 | 1:1, 4:3 and 16:9 |
| Highest resolution | 8256 x 6192 | 4608 x 3456 |
| Highest native ISO | 204800 | 6400 |
| Minimum native ISO | 100 | 80 |
| RAW support | ||
| Autofocusing | ||
| Manual focusing | ||
| AF touch | ||
| AF continuous | ||
| AF single | ||
| AF tracking | ||
| AF selectice | ||
| Center weighted AF | ||
| Multi area AF | ||
| Live view AF | ||
| Face detect focusing | ||
| Contract detect focusing | ||
| Phase detect focusing | ||
| Total focus points | 27 | 9 |
| Lens | ||
| Lens support | Pentax 645AF2 | fixed lens |
| Lens zoom range | - | 25-450mm (18.0x) |
| Maximal aperture | - | f/3.5-5.9 |
| Macro focusing range | - | 4cm |
| Amount of lenses | 6 | - |
| Focal length multiplier | 0.8 | 5.9 |
| Screen | ||
| Type of display | Tilting | Fixed Type |
| Display sizing | 3.2 inch | 3 inch |
| Display resolution | 1,037k dots | 460k dots |
| Selfie friendly | ||
| Liveview | ||
| Touch friendly | ||
| Display technology | - | TFT color LCD with Anti-reflective coating |
| Viewfinder Information | ||
| Viewfinder | Optical (pentaprism) | None |
| Viewfinder coverage | 98 percent | - |
| Viewfinder magnification | 0.85x | - |
| Features | ||
| Lowest shutter speed | 30s | 4s |
| Highest shutter speed | 1/4000s | 1/2000s |
| Continuous shooting rate | 3.0 frames/s | 1.0 frames/s |
| Shutter priority | ||
| Aperture priority | ||
| Expose Manually | ||
| Exposure compensation | Yes | - |
| Custom WB | ||
| Image stabilization | ||
| Built-in flash | ||
| Flash distance | no built-in flash | 2.80 m |
| Flash modes | Flash On, Flash On+Red-eye Reduction, Slow-speed Sync, Slow-speed Sync+Red-eye, P-TTL, Trailing Curtain Sync, contrast-control-sync, high-speed sync, wireless sync | Auto, On, Off, Red-eye, Soft |
| Hot shoe | ||
| AEB | ||
| WB bracketing | ||
| Highest flash synchronize | 1/125s | - |
| Exposure | ||
| Multisegment metering | ||
| Average metering | ||
| Spot metering | ||
| Partial metering | ||
| AF area metering | ||
| Center weighted metering | ||
| Video features | ||
| Supported video resolutions | 1920 x 1080 (60i, 50i, 30p, 25p, 24p), 1280 x 720 (60p, 50p, 30p, 25p,24p) | 1280 x 720 (30, 15 fps), 640 x 480 (30, 15 fps), 320 x 240 (30, 15 fps) |
| Highest video resolution | 1920x1080 | 1280x720 |
| Video format | MPEG-4, H.264 | Motion JPEG |
| Mic support | ||
| Headphone support | ||
| Connectivity | ||
| Wireless | None | Eye-Fi Connected |
| Bluetooth | ||
| NFC | ||
| HDMI | ||
| USB | USB 3.0 (5 GBit/sec) | USB 2.0 (480 Mbit/sec) |
| GPS | Optional | None |
| Physical | ||
| Environmental sealing | ||
| Water proofing | ||
| Dust proofing | ||
| Shock proofing | ||
| Crush proofing | ||
| Freeze proofing | ||
| Weight | 1550 grams (3.42 lbs) | 178 grams (0.39 lbs) |
| Physical dimensions | 156 x 117 x 123mm (6.1" x 4.6" x 4.8") | 97 x 61 x 33mm (3.8" x 2.4" x 1.3") |
| DXO scores | ||
| DXO All around rating | 101 | not tested |
| DXO Color Depth rating | 26.0 | not tested |
| DXO Dynamic range rating | 14.7 | not tested |
| DXO Low light rating | 4505 | not tested |
| Other | ||
| Battery life | 650 images | - |
| Battery style | Battery Pack | - |
| Battery ID | D-LI90 | D-LI92 |
| Self timer | Yes (2 or 10 secs) | Yes (2 or 10 sec) |
| Time lapse recording | ||
| Storage type | Dual SD/SDHC/SDXC slots | SD/SDHC/SDXC, Internal |
| Card slots | Dual | 1 |
| Cost at launch | $5,024 | $210 |