Hitfabryk Posted January 10, 2015 Share Posted January 10, 2015 Yes its a very good lensThanks Quote Link to comment Share on other sites More sharing options...
studiodc Posted January 10, 2015 Share Posted January 10, 2015 Error on my part. It happens. Perhaps the Nikon 28-70mm f2.8 is? Regardless, the general question still stands though. Push-pull compared with twist for use with rails rig and matte box. Is there a reason to preference either?Push-pull lenses won't work well with a matte box and rails for a few reasons: 1. The length of the lens extends and retracts causing a shift in the matte box relative position and requiring a reset each time you change lengths. Also accidental fast zooming can break glass filters as the lens' forward extension can put significant pressure on them.2. The lenses typically cannot be used with a follow focus because the twisting action of the focus can cause the zoom ring to slide and thus change shot framing. Also you can't put a follow on the zoom if you would want to. 3. Most push pull zooms will if swung around slightly or significantly change the zoom position over time. This is unsuitable for anything but dead level static shots. 4. The finger position required to control zoom is more difficult with rails in the way than with a ring and adding a follow focus to the mix only makes changing your focal length even more of a pain. These apply even if you treat the zoom as a series of primes "all-in-one" so to speak. In short, it can be done but in practice they are usually such a bundle of frustration for a cinematographer that it's not worth it. James Maynard Gelinas 1 Quote Link to comment Share on other sites More sharing options...
andy lee Posted January 10, 2015 Share Posted January 10, 2015 very nicely said! as they rotate as you focus you have no chance of using a mattebox I do have some push pull lens I only use handheld - run n gun.... no matteboxlike the excellent Nikon 35-70mm f2.8 this is a killer lens alot smaller than the Nikon 28-70mm f2.8 that I loveoptically the galss is the same quility its just as sharp just alot smaller ....BUT its push pull so you have to work round that where you can . Quote Link to comment Share on other sites More sharing options...
JBraddock Posted January 10, 2015 Share Posted January 10, 2015 Is anyone using a Canon FD 35-105mm f3.5 on focal reducer and with the focal reducer added, do you think that m4/3 mount is strong enough to hold these two without any extra support? BTW, Canon FD 35-105mm is around 600gr. Quote Link to comment Share on other sites More sharing options...
dahlfors Posted January 10, 2015 Share Posted January 10, 2015 I'm looking for a cheap Nikon mount 35mm lens. Nikkor seems to have a few versions. Pre-AI, AI, AI-S and D. Which one is recommended?Nikon AI-S is very good the glass is the same in the D version its just a more modern styling to the bodyMy first picks for primes in those ranges would be 35mm f/2 AF-D, or to go a bit wider and get the excellent 28mm f/2.8 AI-S.The 35mm f/2.8 AI might be worthy to have a look at.And as you said earlier - the 35mm f/1.8G DX lens is a nice lens for Nikon APS-C bodies. Due to lack of aperture ring it's pretty useless for other cameras. Quote Link to comment Share on other sites More sharing options...
James Maynard Gelinas Posted January 11, 2015 Share Posted January 11, 2015 Push-pull lenses won't work well with a matte box and rails for a few reasons: 1. The length of the lens extends and retracts causing a shift in the matte box relative position and requiring a reset each time you change lengths. Also accidental fast zooming can break glass filters as the lens' forward extension can put significant pressure on them.Wait a minute. Is this what you mean by a push-pull lens?Panasonic Lumix 14-42 kit lens:2. The lenses typically cannot be used with a follow focus because the twisting action of the focus can cause the zoom ring to slide and thus change shot framing. Also you can't put a follow on the zoom if you would want to. 3. Most push pull zooms will if swung around slightly or significantly change the zoom position over time. This is unsuitable for anything but dead level static shots. 4. The finger position required to control zoom is more difficult with rails in the way than with a ring and adding a follow focus to the mix only makes changing your focal length even more of a pain. These apply even if you treat the zoom as a series of primes "all-in-one" so to speak. In short, it can be done but in practice they are usually such a bundle of frustration for a cinematographer that it's not worth it. Very helpful, thank you. Quote Link to comment Share on other sites More sharing options...
andy lee Posted January 11, 2015 Share Posted January 11, 2015 Is anyone using a Canon FD 35-105mm f3.5 on focal reducer and with the focal reducer added, do you think that m4/3 mount is strong enough to hold these two without any extra support? BTW, Canon FD 35-105mm is around 600gr.I use both those together and I have them on my Tecnoir shoulder rig so there is a lens support holding the lens on the rods Quote Link to comment Share on other sites More sharing options...
andy lee Posted January 11, 2015 Share Posted January 11, 2015 Wait a minute. Is this what you mean by a push-pull lens?Panasonic Lumix 14-42 kit lens:Very helpful, thank you.thats not a push pull lens its a regular fly by wire Panasonic lens this is a push pull zoom lenshttp://kenrockwell.com/nikon/3570.htm James Maynard Gelinas 1 Quote Link to comment Share on other sites More sharing options...
James Maynard Gelinas Posted January 11, 2015 Share Posted January 11, 2015 this is a push pull zoom lenshttp://kenrockwell.com/nikon/3570.htmOK. I have a cheap Canon FD mount 70-210mm f4. It works in a similar manner to the Nikon 35-70mm f2 you linked to. Now I'm on the same page. Thank you for your help.Given what StudioDC wrote, what's the best zoom type for use on rails with a matte box? Or are zooms such a PITA that sticking with primes remains the best solution? Quote Link to comment Share on other sites More sharing options...
macnerd Posted January 11, 2015 Share Posted January 11, 2015 Just an idea, we need a thread where if you come across a good deal on a great lens you'll just post the link in the thread..only certain professionals will be allowed to post links in that thread for e.g Andy.. Quote Link to comment Share on other sites More sharing options...
studiodc Posted January 12, 2015 Share Posted January 12, 2015 Given what StudioDC wrote, what's the best zoom type for use on rails with a matte box? Or are zooms such a PITA that sticking with primes remains the best solution?Well, some zooms have the remarkable qualities of both a non-rotating front element AND no length changes on focus OR zoom (internally focused, internally zoomed). I should note that as you've observed already, even non-push-pull zooms (those who zoom by turning a ring) can change length when they zoom. So be on the lookout for lenses which don't change length when focused OR zoomed and you'll have found an excellent candidate for a matte box with the least amount of compromises and frustration. Also, those with minimal length changes can sometimes be used, especially on the tele-end as you can just back them off the filter glass by the length they move, and use a sock or even gaff tape to block light off between the filter and the lens element. Quote Link to comment Share on other sites More sharing options...
Cinegain Posted January 12, 2015 Share Posted January 12, 2015 Just curious... if you're using a rails based setup, why even bother with matteboxes that attach to the lens itself (clip-on) if you can mount one to the rails and get yourself a donut? Quote Link to comment Share on other sites More sharing options...
JBraddock Posted January 12, 2015 Share Posted January 12, 2015 I use both those together and I have them on my Tecnoir shoulder rig so there is a lens support holding the lens on the rodsThank you. Just one more question then Any. I hear that this lens is par focal if it is properly adjusted. Does it maintain that feature with the focal reducer? Quote Link to comment Share on other sites More sharing options...
andy lee Posted January 14, 2015 Share Posted January 14, 2015 Thank you. Just one more question then Any. I hear that this lens is par focal if it is properly adjusted. Does it maintain that feature with the focal reducer?ive not had mine fully parfocal its very nearly parfocal - its usable Quote Link to comment Share on other sites More sharing options...
Juan Cholbi Posted January 18, 2015 Share Posted January 18, 2015 Hi everyone,I'm new in this world and I'm trying to do some music videos. I've recently got a Sony A7 with a Bower 85mm f1.5 (with a canon EF adapter to Sony e-mount) and a Yashica 50mm f1.7. with a C/Y to e-mount adapter. I'm looking for a very very cheap (I'm in very low budget rightnow) wide angle lens to complete my set. What lens can you recommend to me? (24mm or below plus adapter) Around $60 box on ebay will be great... Quote Link to comment Share on other sites More sharing options...
andy lee Posted January 18, 2015 Share Posted January 18, 2015 Cosina 19-35mm f3.5-4.5 is about the cheapest wide you can get on ebay - and it is rectiliner too which is nice - no bendy edges! Quote Link to comment Share on other sites More sharing options...
Hitfabryk Posted January 19, 2015 Share Posted January 19, 2015 Hello Andy,I do have an old Sharp TV cam ( model XC-35p) with a mountable lens a TV Z 1.1.8 f =16-96mm serie nummer '103276' Japan..It would be great to try it on my EM1, is that possible? ThanksSiep Quote Link to comment Share on other sites More sharing options...
andy lee Posted January 19, 2015 Share Posted January 19, 2015 eerr - maybe!....it sounds like it maybe a B4 mount broadcast lens -if it is 2/3 inch format and has a x2 extender - then you can get a B4 - Micro 4/3 adaptor off ebayI have one I use on my Fujinon B4 TV Z lenses - they are superb super zooms post a pic of your lens so I can see the mount on it Quote Link to comment Share on other sites More sharing options...
Hitfabryk Posted January 20, 2015 Share Posted January 20, 2015 Thanks Andy, here I got some pic'sSiep Quote Link to comment Share on other sites More sharing options...
andy lee Posted January 20, 2015 Share Posted January 20, 2015 ok this looks like it is a c - mount lens (screw thread) with NO x2 converter on the back to flip inso it maybe for 1/3 inch sensor so will vignette on micro 4/3 - unless you have a Panasonic camera and can to EX TELE mode to crop in x2 . its hit and miss you will have to try it a c mount to micro 4/3 adapter is about £10 off ebay so have a go Quote Link to comment Share on other sites More sharing options...
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