Pentax SMC F 1:2.8 100mm Macro Autofocus Camera Lens Japan Made 1980s

Description

Very nice lens, tested and working well. Some body scuffs present, glass is clean and clear. Please see photos. Price includes shipping, we will package this unit with care.
Here is an online review of this lens:
The F100/2.8 Macro was released in 1987 and was a direct replacement for the A100/2.8 Macro. The F100/2.8 Macro remained in production until 1991 and was replaced by the optically identical FA100/2.8 Macro. The F100/2.8 is the first Pentax auto-focus 100mm macro.
Optics:
Stellar optics! The F100/2.8 Macro also features Fixed Rear Element Extension (FREE). The nine elements in eight groups, is the same optical formula Pentax uses today in the D FA version of this macro lens.
Focal Length:
The 100mm focal length allows for a decent working distance when doing macro work, so it’s a lot better than the shorter 50mm version. Though doing 1.0x magnification in the field, handheld, is still not easy. I find most of my shots are around .25x to .5x magnification, when I’m shooting handheld outdoors. This is also a great focal length for portrait, landscape or detail work.
Build:
The F100/2.8 Macro is a well-built lens almost on par with any older Takumar/K/M series lens that I own. Excellent for an auto-focus lens!
Usage/Handling:
The F100/2.8 Macro is on the big side, but still usable hand-held. The big issue is that the manual focus ring is too small and in the wrong location, so when balancing the lens hand-held you tend to accidentally touch the ring just when tripping the shutter. Auto-focus is something I’ll never use on this lens and the focus limiter is also located it a spot where a larger focusing ring should be. The F100/2.8 Macro’s distance/magnification scale is OK, considering it’s an AF lens. Overall, the handling is on the clunky side for a 100mm macro lens when hand-holding and manual focusing. Using the F100/2.8 on a tripod improves things somewhat and for me that’s the best way to use it.
The F100/2.8 Macro has a 58mm filter ring and requires no hood, due to the deeply recessed front element. The F100/2.8 Macro came with the S80-160 soft case.
Speed:
F/2.8 is now the standard for Pentax Macro lenses, so it’s fast enough for most lighting situations.
Magnification:
The F100/2.8 Macro has 1.0x magnification, which is a must have for me in the 100mm macro focal length. The higher magnification is something I use regularly with this lens and almost never on a 50mm macro
The F100/2.8 Macro vs my other 100mm macro lenses:
I also own the K100/4 & A100/2.8 macro, this is how I rate the three against each other:
Optics: All three have different optical formulas, but are equally sharp, so a three-way tie.
Speed: F100/2.8 & A100/2.8 are the fastest and the K100/4 is the slowest.
Magnification: The F100/2.8 & A100/2.8 have 1.0x magnification. The K100/4 only has 0.5x magnification.
Minimum Focusing Distance: F100/2.8 & A100/2.8 are tied, K100/4 comes in last.
Build: The K100/4 & A100/2.8 are slightly better and the F100/2.8 is just behind.
Handling: The K100/4 & A100/2.8 are tied for the best, the F100/2.8 comes in last because of its poor manual focusing.
Value: The K100/4 is the best value for what I paid for it, the F100/2.8 comes in second and the A100/2.8 is on the pricey side due to it being a rare lens.
Up for sale i have a :
Extron Streaming Media Encoder SME 100
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Unit comes with a power cord, no other accessories will be included.
Condition: Used, item was pulled from a working environment. It does show small damage like scratches/scuffs/dents.
Shipping: My shipping quote is only for items being ship inside the United States. Hawaii and Alaska please ask me for a shipping quote before purchasing the item. I do ship internationally using eBay Global shipping program.
I only accept returns on this item if something is wrong with it, otherwise its a Final Sale!