Focus Fix Tips

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George1985

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Hello. I want to fix my focus on Yi cam but i have some questions... My cam has latest official FW, and i have the cam for dashcam. Also for other situations, but mostly for dashcam. Also the recording videos usually i do with 1080p/30Fps cause my Pc is old and with 60FPS the image tearing sometimes...

So, after telling you for what i i want the cam, here are my qusetions before to start the focus fixins...

1. When i connect the Yi cam with the TV (with HDMI cable), the battery of the cam must be in, right? I mean at first i saws on videos that they put of the battery before starts removing the front case. But then i believe we should put the battry back, right? Cause the battery works as calculator also if the Volts/amp are higher. So i should put in back the battery before the conection with TV starts?


2. When i adjust the lens, and see the result on TV, in which mode the cam should be? Photo mode or video mode? If should be video, in which quality? 1080p/30fps (which i will use) , 1080p/60fps or 2K/30fps ?


3. To remove the glue, i m thinking using an eyebrow tweezer,

https://barberscissors.files.wordpress.com/2010/12/eyebrow-tweezers-925.jpg

i think should be better at controlling, and more safe? Dont know...


4. I bought this silicone to re-glue the lens, should this work ok?

http://www.windowparts.co.uk/media/.../7/376.silicone_u/soudal-u-ac-silicone-31.png


5. Last question, and important. For focus fix i' ve seen other threads that they suggest the distance cam - object, should be 112cm. Other says 120cm. Other done their focus at 3metres, others at 5 metres.... What should be the distance for best results?


Thank you very much, sorry for my english and hopping to answer me... Thank you.
 
1) Yes, battery inside.
2) Just connect the cam by the HDMI cable, it will come to the right mode by itself.
3) Use whatever hard and precise. And check it properly. I have 2 cams...one had only 2 spots of the glue, the other one had 4 spots.
4) That is not good in my opinion. Best is the heat-melting glue, the plastic one.
5) This depends on what are you going to film. If some macro or very short distance details of things, focus to close distance. Different it would be for indoor/interior filming, and different it would be for exterior/distant scenarios.
 
Thank you. Could you please give a link about which glue do you mean? Hot glue with gun? Or UHU glue should work ok with temperatures?

As for the distance i want the cam more for dashcam. Maybe focus the lens at 3 metres should be a good choice?
 
make the focus on the widest point you can focus (the near focus remains sharp), test it and you will see on TV what point for focussing will be the best. My experience is at ca. 5m is the best focussing point.
 
The re-focus done and the difference is enough. But, it hapenned something bad... i didnt want of course.. As i tried to remove one glu with the knife, the knife touch the tape which i show in pic, as a result did a very very small scratch... ๐Ÿ™ I mean very very small you have to see very carefully and very close to can see it... I didnt take a photo but i found on the internet a photo to show you were eactly i mean.. What is this tape for? I tested the cam at photos, videos, wifi, sound, 30minutes recording at 1080p/30 fps and everything works perfect. I show the results on pc and the difference is big from original focus. But, my mind is all the time on that little scratch... I m afraid if will cause probles at future on the cam.. I hope not.. Now everything work really great.

https://www.flickr.com/photos/27070604@N05/24505327690

See the green dot.
 
Well if all works now I wouldn't be worried. As long as it isn't off I suppose the connection still works and I don't think it would break by itself ๐Ÿ™‚
 
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