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06-29-2014, 03:06 PM   #1
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Pentax k-30 lens sync

OK

i just bought recently a pentax k-30 it came with 18-55 lens and 3 extra x lens

28mm cosina 2.8 and 50mm 1.7 vivtar and a 55/70-300mm Tamrom ( sorry its either 55-70mm forget now )

anyway the 18-55mm works perfect excellent fantastic could not ask for more .

tonight i finally attempted to fit the 28mm and 50mm , when i fit it asks for a lens number so i enter 28mm .

but then nothing no F number no metering etc , i see no electrodes on these so i presume they are just manual AF and Manual Exposure
which is a bit of a pain .


but the tamron i was expecting this to just auto sync as my pentax 18-55mm lens does - but when i fit it it does the same no F number .

hope i made that clear its late i should not of started this tonight tbh .

06-29-2014, 03:12 PM   #2
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https://www.pentaxforums.com/forums/58-pentax-beginners-corner-q/110658-using...x-dslrs-f.html
06-29-2014, 03:15 PM   #3
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i just got the tamron working i turn dial on bottom of lens to A position and F number Popped up .

so i take the other 2 lens must me fully Manual AF and exposure , that tough with no light meter .

thanks
06-29-2014, 03:20 PM   #4
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QuoteOriginally posted by sebenza Quote
so i take the other 2 lens must me fully Manual AF and exposure , that tough with no light meter .
Read the article Parallax linked for instructions on how to meter with those lenses.


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06-29-2014, 03:26 PM   #5
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Not as tough as you imagine. Read the links above and go practice. Remember catch in focus, it is very convenient.
06-29-2014, 04:09 PM   #6
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ok thanks ill do some study tomorrow .

i was panicked a bit with tamron lens more that anything tbh , so now i can relax a bit and learn the other 2 lens at my leisure .


" Not as tough as you imagine "

maybe not - i just been practicing a bit and got quite a few good photos , will be easier to with better light tomorrow .

thanks again !!
06-30-2014, 07:08 PM   #7
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Since nobody has really explained it, the A series lenses only communicate with the camera when used in the A position on the aperture ring. They will work in full manual mode quite well, once you understand the info in the links above. But that's why it suddenly started working when you switched to A.

Practice is all it takes, I use almost all manual lenses, it's second nature though, since I've been using them with film for 30 years too. Even with my one A series 50mm I quite often use it in full manual mode. Rarely use the 18-55 kit lens, but it does pretty well, except that I actually miss the aperture ring...

Once you use them a bit, you'll probably like the manual lenses pretty well. Not hard to do, you just have to remember to check the aperture setting (which I regularly forget) before starting out. I got 3 or 4 well overexposed shots a couple of days ago before I realized I had just switched from macro extension tubes back to just the 135mm, and finally checked the aperture...f2.8...I usually shoot at f8, which worked great once I had the presence of mind to check it...so do try to remember that, it can cause some confusion...
07-03-2014, 12:25 PM   #8
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thanks pete ,

ive been practicing hot and miss with exposure which is a pain , but manual focusing is a lot of fun .

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