===== Pentax-A* SMC 600mm f/5.6 ED [IF] ===== 
{{ :lens:pentax-astar_smc_600mm_f5.6_ed_if_.png?400|}}
==== Summary ====
The SMC Pentax-A* 600mm f/5.6 ED [IF] is a manual-focus super-telephoto prime introduced in 1984 for the Pentax K-mount, and produced until 2000. It was Pentax’s first 600mm lens for 35mm format and part of the elite A* (Star) series, designed to deliver professional-grade optics with extra-low dispersion (ED) glass and internal focusing (IF). Though slower than its autofocus F* and FA* 600mm F4 successors, it’s significantly lighter, more compact, and still highly regarded for its optical clarity and handling. The lens features an 8-element, 6-group design with a 9-blade automatic diaphragm, stopping down to f/45. It focuses as close as 5.5 meters, yielding a 0.12× magnification ratio, and uses a rear-mounted 49mm drop-in filter along with an optional 112mm front protective filter. It weighs 3280g, measures 133 × 386mm, and includes a built-in sliding hood, a rotating tripod collar, and a dedicated trunk case. The aperture ring includes an “A” setting for full automation on compatible bodies, and the lens supports Pentax rear converters like the A 1.4X-L and 2X-L.
==== Tech Specs ====
| Manufacturer    |Pentax|
| Series          |A* Series Prime|
| Model           |SMC|
| Focal Length    |600mm|
| Max Aperture    |f/5.6 ED [IF]|
| Min Aperture    |f/45|
| Format          |Full-Frame|
| Image Circle    |-|
| Minimum Focus   |550cm|
| Focus Rotation  |°|
| Iris Blades     |9|
| Optical Design  |8/6|
| Squeeze         |none|
| Front Diameter  |133mm|
| Filter Thread   |112mm, 49mm rear|
| Focus/Zoom Rod  |none|
| Native Mount    |Pentax K|
| Data Protocol   |none|
| Length          |386mm|
| Weight          |3280g|
| Body Telescope  |-|
| Body Material   |-|
| Focus Drive     |-|
| Iris Drive      |-|
| Zoom Drive      |-|
==== History ====
Country of Origin:  \\
Release Date: 1984 \\
Launch Price:  \\
Design Revisions:  \\

==== Service ====
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Service Manual: (Insert link to manual here) \\
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Full CLA: **TBD hrs.**\\
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==== Cine-Mod ====
<nodisp 8>
Focus Ring O.D.: -\\
Zoom Ring O.D.: -\\
Iris Ring O.D.: -\\
De-click Y/N: -\\
Additional Notes: \\
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==== Notes ====
==== Media ====