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Pentax Q series

From Wikipedia, the free encyclopedia

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.[1] As of September 2012, it was the world's smallest, lightest interchangeable lens digital camera.[2] 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).[3] The Q system is now discontinued.[4]

Characteristics

The Pentax Q and Q10 sensors have a crop factor of 5.53×[5] while the Pentax Q7 and Q-s1 have a crop factor of 4.65×.[6] 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.[7] A Pentax adapter with a synchronized shutter for Pentax K-mount lenses was released in October 2012.[8]

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.

Models

Pentax Q

The initial model was announced in June, 2011.

Pentax Q10

Announced in September, 2012, the Q10 has a slightly redesigned body and an improved sensor.[9] Most features and specifications were unchanged.

Pentax Q7

The Q7 was announced in June 2013 and has a larger 1/1.7" sensor.[10] It is available in a wide variety of colors.

Pentax Q-S1

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.)

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.

See also

References

  1. ^ Pentax Q small-sensor mirrorless camera announced and previewed
  2. ^ Pentax Q - 180 g; Nikon J1 - 234 g; Olympus E-PM1 - 265 g
  3. ^ "Pentax announces Q7 with larger 12MP BSI CMOS sensor". Digital Photography Review. Retrieved 7 December 2013.
  4. ^ http://www.ricoh-imaging.co.jp/english/products/index.html
  5. ^ "Pentax Q". DPReview. 2011-06-23. Retrieved 2018-09-30.
  6. ^ "Pentax Q7 Review". DPReview. 2013-08-08. Retrieved 2018-09-30.
  7. ^ "Lens Adapters | B&H Photo Video". Bhphotovideo.com. Retrieved 2013-06-16.
  8. ^ "Pentax Adapter Q for K-mount Lenses". PhotographyBLOG. 2012-09-11. Retrieved 2013-06-16.
  9. ^ "Pentax Ricoh introduces Q10 small-sensor mirrorless camera: Digital Photography Review". Dpreview.com. Retrieved 2013-06-16.
  10. ^ "Pentax announces Q7 with larger 12MP BSI CMOS sensor: Digital Photography Review". Dpreview.com. Retrieved 2013-06-16.

External links

This page was last edited on 17 December 2020, at 11:05
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