bower 8mm f/3.5 fisheye

YOSH!
besides owning a bower 14mm f/2.8 i also own a bower 8mm f?3.5 fisheye for k mount. i think i paid around 300 uhmerikan dollars for it.

cheap k mount lenses come with the AE chip for camera controlled auto, Av, Tv and manual adjustment. other cameras do not. the same lens is full manual.

for the price this lens is fun. itz not full full circular fisheye. it fills the apc sensor. everything is curved at corners.

i use it on a used pentax d100 6 megapixel. itz a good match. good for klawd porn and archie texture. itz sharp enough to crop.

dis iz inneresting. if cropped enough the central portion is rectilinear. when stopped down it haz very little vignetting in corners.

itz usable for wide field astrophotography if you dont mind high ISO noise.

auto AE lens for other cameras cost twice as much. no can do. i didnt see it on b&h today so i am wandering it it is discontinued. itz a collector’s item.

except for the permanent attached lens hood it appears to be all metal construction. itz small and lite weight about the size of a prime or kit lens. it iz much smaller and lighter than the 14mm f/2.8.

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solar powered lawn mowing

YOSH!
i done did do mow dee lawn today using a portable solar power generator cart.
dis spring has ben much klawdee.
lucklishly i had won solar cart all juiced up and ready to go. i wuz about 3 pm EDT. it tuk 30 minnitz or so. the inverter readout indicated 13.9 volts at start and 12.7 wen i finished.

i haznt ben able to solar brew coffee or make oatmeal much dis spring either. early today i wuz foggy dork. dee sun didnt break true until 10:30 or so. i rushed the cartz out to capture foe tonz.

hawt dam! 90 percent hum did it tee and 83 degrees F. i only did the front section becuz it looked too ragged.

last yeer it wuz sunny almost every day all day.

i aint complaining. i red dat duh grape stake of new jerky haz a 50% average sun/klawd ratio any way. too much sun one period, too much klawdz next period for dee average to stay dee same.

i can only do wut i can do. i am still glad i stuk it to duh man and hiz 15 cents a kill a watt. FART!

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BOWER 14MM F/2.8 K MOUNT

YOSH!
i bought a bower 14mm f/2.8 wide angle lens for a used pentax d200 i have. i paid $350 at b&h. except for the permanent atatched petal lens hood it seems to be all metal construction. it is massive and rather large about the size of a short telephoto or fast macro.

today i did a search on b&h and it wasnt listed. i guess it’s discontinued.

i haz ben very disappointed in this lens. hard to focus, queer distortion, soft at f/2.8. a wide angle lens of such short focal length is supposed to have great depth of field when stopped down and get sharper. this did nothing.

i decided to see if i could adjust it. i lifted up the rubber focus ring grip. the only thing securing the distance scale to focusing barrel was/is/will be cellophane tape! i kid you not.

under the cellophane tape are 3 split rings secured with a screw each. i peeled off the tape and removed the screws and rings. there is a slot under one ring and i can adjust an internal lens element.

i set the camera on a tripod 2 feet away from a target, a box with small letters on it, and started fooling around.

roughly i estimated the distance scale up against the focusing ring and moved it to 5 feet and checked focus. i did this by taking a bunch of photos and then using the camera’s magnifying feature to examine the photo.

the ring is now accurate for 1.5 feet, 2 feet and 5 feet. anything below that and past that isnt even close.

what ever i did to the internal element has eliminated the “queer distortion”.
i haz ben to the city to snap photos. no matter how careful i line up the camera i always get curvature on the left side of photo. sure, wide angle lenses have distortion. it’s supposed to be rectilinear. the distortion of perspective, line meeting at infinity.

poorly corrected lens can have pin cushion,barrel and other distortions. my example had as severe curve distortion on left side.

it’s gone! it also seems to focus much sharper now wide open. stopping down to f/4 puts it near perfect. and…further stopping down to f/5.6 and f/8 increase the depth of field to a fantastic amount.

i am happy with this lens. for $350 it rivals brand name models. i would even say i have a collector’s item.

but who does that? partial disassembly and fooling around to see what happens? not many i’ll warrant. i noticed 3 other set screws further up the focusing ring. maybe i could have tweaked it more.

i want to do some astronomy pix to see if it got better.

i bought this k mount model because it has the AE chip in it for full Av,TV and even in camera manual adjustment. the lens reports f stops and focal length to exif comments. if it is no longer available i guess i’m lucky.

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