Focus fine tune aid - Spyder lens cal

mikeysaling

mikeysaling

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michael
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Has anyone used or have one of these ? do they work ? easy to use ? Value !!! ? what is the alternative for focus fine tune - suggestions pls.
 
Easy to use, yes they work, better value than some of the software alternatives IMO ... alternatives suggested are cereal box & ruler used like the lenscal, line of AA batteries or just test on a subject sitting on grass and look for front or back focus based on the blades of grass :)
 
Brought one after looking at home made devices on youtube and the like and decided it would be money well spent.
As Gramps said there easy to use and very precise.
 
thanks chaps - i'll order one and report !!! - up til now I've just thrown a tv times on the floor and focussed on various progs . adjusting back/forward on the results. With latest camera D750 have several lenses and havn't found a 'sweet' +/- for my fav 24-70 f2.8 . Primes are easy but the two zooms I use (24-70 Nikon and 70-300 tamron) are more difficult - maybe I can do several FL tests a bit quicker and then take the 'average' ?? - thoughts ?
 
Hi sk66 - tried the 'dot tune' same prob with various focal lengths - not so quick or easy. however I will report back on this thread . do appreciate your input.
 
mikeysaling said:
thanks chaps - i'll order one and report !!! - up til now I've just thrown a tv times on the floor and focussed on various progs . adjusting back/forward on the results. With latest camera D750 have several lenses and havn't found a 'sweet' +/- for my fav 24-70 f2.8 . Primes are easy but the two zooms I use (24-70 Nikon and 70-300 tamron) are more difficult - maybe I can do several FL tests a bit quicker and then take the 'average' ?? - thoughts ?
Click to expand...

Yep, fine tuning zooms isn't something that you can rely on in the same way as primes. If you tend to shoot at the long end of your 70-300 the majority of the time, you could do it @ 300mm, but it'll probably c0ck it up @ the wider end. Also try tuning it @ a distance you use mostly.
 
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OldCarlos said:
Yep, fine tuning zooms isn't something that you can rely on in the same way as primes. If you tend to shoot at the long end of your 70-300 the majority of the time, you could do it @ 300mm, but it'll probably c0ck it up @ the wider end. Also try tuning it @ a distance you use mostly.
Click to expand...
Yes. It's especially camera dependent. With my D800 I had to continually retune when the working distance changed significantly (not w/ my D810/D4).
The more often you do it the quicker it gets.
 
I'll give this thing a try - variables are focal length - distance to subject - and even f number. will report when I get it.
 
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