The Pentax Q series is a series of mirrorless interchangeable-lens cameras made by Pentax and introduced in 2011 with the initial model Pentax Q. As of September 2012[update], it was the world's smallest, lightest interchangeable lens digital camera. The first models used a 1/2.3" (6.17 x 4.55 mm) back-illuminated sensor CMOS image sensor. The Q7, introduced in June 2013, uses a larger 1/1.7" type sensor (7.44 x 5.58 mm). The Q system is now discontinued.
The Pentax Q and Q10 sensors have a crop factor of 5.53× while the Pentax Q7 and Q-s1 have a crop factor of 4.65×. The original Pentax Q sensor has a 12.4 megapixels with 1.52 µm pixel pitch. All Pentax Q system cameras have a short flange focal distance (FFD) of 9.2mm. With a 5.53× crop factor, an adapted 100mm lens has the equivalent field of view (FOV) of a 553mm telephoto in the 35mm full-frame format. An additional implication of these relatively large crop factors is that depth of field (DOF) is proportionally increased relative to full-frame systems at the same equivalent focal length and aperture; this puts the Pentax Q system cameras at a distinct advantage when capturing as much as possible with acceptable focus is important.
Pentax Q system cameras do not have a mechanical shutter or neutral density filter in the camera body. Because of this, some lenses and adapters have a built-in mechanical leaf shutter and/or a built-in ND filter.
The short flange focal distance of the Pentax Q series enables lenses from many manufacturers to be adapted to it, including Olympus OM, Canon FD, Minolta, M42 screw mount, M39 Leica, C-Mount, D-Mount, Pentax K, and Pentax 6×7. A Pentax adapter with a synchronized shutter for Pentax K-mount lenses was released in October 2012.
The camera is equipped with "SR" sensor-shift image stabilization technology to improve image quality when using the camera without a tripod. It works with all native and adapted lenses. The Pentax Q also features a "blur control" mode to provide a pseudo shallow focus effect when desired.
The initial model was announced in June, 2011.
Announced in September, 2012, the Q10 has a slightly redesigned body and an improved sensor. Most features and specifications were unchanged.
The Q7 was announced in June 2013 and has a larger 1/1.7" sensor. It is available in a wide variety of colors.
The Q-S1 was announced August 4, 2014. It has a 1/1.7" sensor. In addition to the Q-7 features, it has auto focusing in the video mode (with the 01, 02 and 08 lenses.)
Eight lenses have been released in the Pentax Q system. (AF = Auto Focus, MF = Manual Focus):
|Mfg.||Lens||Type||Focal Length||35mm Equiv (Q, Q10)||35mm Equiv (Q7, Q-S1)||Max. Aperture||Min. Aperture||Leaf Shutter||Filter Diameter||Year|
|Pentax||01 Standard Prime||AF/MF, single-focal||8.5 mm||47 mm||40 mm||1.9||8||yes||40.5mm||2011|
|Pentax||02 Standard Zoom||AF/MF, varifocal||5–15 mm||28–83 mm||23–70 mm||2.8-4.5||8||yes||40.5mm||2011|
|Pentax||03 Fisheye||MF, single-focal||3.2 mm||18 mm||15 mm||5.6||5.6||no||n/a||2011|
|Pentax||04 Toy Lens Wide||MF, single-focal||6.3 mm||35 mm||29 mm||7.1||7.1||no||n/a||2011|
|Pentax||05 Toy Lens Telephoto||MF, single-focal||18 mm||99 mm||83.7 mm||8||8||no||n/a||2011|
|Pentax||06 Telephoto Zoom||AF/MF, varifocal||15–45 mm||83–249 mm||70–209 mm||2.8||8.0||yes||40.5mm||2012|
|Pentax||07 Mount Shield Lens||Fixed focus, single focal||11.5 mm||64 mm||53 mm||9||9||no||n/a||2013|
|Pentax||08 Wide Zoom||AF/MF, varifocal||3.8-5.9 mm||21.3–33 mm||17.5–27 mm||3.7 - 4||7.1 - 8||yes||49.0mm||2013|
|Pentax||Adapter Q for K-Mount Lens||n/a*||See below**||Approx. 5.6 times the
focal length of lens
|Approx. 4.5 times the
focal length of lens
|See below***||See below****||yes||See below**||2012|
Notes: *Any lenses adapted to the adapter will function in MF only. Whether it is single or varifocal depends on the optical characteristic of the lens.
**Although the adapter itself cannot have a focal length or filter diameter, the focal length/filter diameter for adapter/lens combination will depend on the lens attached.
***The maximum aperture depends on the lens aperture for most lenses. However, for larger-aperture lenses, since the adapter controls the aperture, the effective f-stop may increase or falloff may become more apparent.
****The minimum aperture depends on the adapter.
- Pentax Q small-sensor mirrorless camera announced and previewed
- Pentax Q - 180 g; Nikon J1 - 234 g; Olympus E-PM1 - 265 g
- "Pentax announces Q7 with larger 12MP BSI CMOS sensor". Digital Photography Review. Retrieved 7 December 2013.
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- "Pentax Q". DPReview. 2011-06-23. Retrieved 2018-09-30.
- "Pentax Q7 Review". DPReview. 2013-08-08. Retrieved 2018-09-30.
- "Lens Adapters | B&H Photo Video". Bhphotovideo.com. Retrieved 2013-06-16.
- "Pentax Adapter Q for K-mount Lenses". PhotographyBLOG. 2012-09-11. Retrieved 2013-06-16.
- "Pentax Ricoh introduces Q10 small-sensor mirrorless camera: Digital Photography Review". Dpreview.com. Retrieved 2013-06-16.
- "Pentax announces Q7 with larger 12MP BSI CMOS sensor: Digital Photography Review". Dpreview.com. Retrieved 2013-06-16.