eckythump
Posts: 14
Joined: Thu May 16, 2013 2:21 pm

close ups (closer ups) with cheap eye glass

Thu May 16, 2013 3:29 pm

got a camera yesterday from cpc,

needed to get it working at much shorter distances, which seems to be doable using similar tricks to those used for smartphones.

I taped the camera to a cheap eyeglass (jewellers 'loupe'), not sure about the magnification factor, and stuck it to a ruler (I also taped over the red LED, which was strongly reflected in the eyeglass). These eyeglasses can be bought for a pound or two. As can be seen from the pictures, the focus seems to be best at about 10-12 cm. There are some pictures of a £1 coin taken at various distances, with the coin slightly tilted (these pictures are at lower resolution than the original jpgs to get them below the filesize limit for attachments). I have sent off for a set of these plastic eye glasses which are supposed to have various magnifications and will see what happens.

anyone tried anything similar?
Attachments
12cm.jpg
12cm
12cm.jpg (43.66 KiB) Viewed 2187 times
a.jpg
with camera
a.jpg (43.85 KiB) Viewed 2187 times
b.jpg
eyeglass
b.jpg (40.05 KiB) Viewed 2187 times

dom
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 5661
Joined: Wed Aug 17, 2011 7:41 pm
Location: Cambridge

Re: close ups (closer ups) with cheap eye glass

Thu May 16, 2013 3:46 pm

disable_camera_led=1 in config.txt may be useful.

eckythump
Posts: 14
Joined: Thu May 16, 2013 2:21 pm

Re: close ups (closer ups) with cheap eye glass

Thu May 16, 2013 3:50 pm

dom wrote:disable_camera_led=1 in config.txt may be useful.
yes, much neater than taping over it

jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 27422
Joined: Sat Jul 30, 2011 7:41 pm

Re: close ups (closer ups) with cheap eye glass

Thu May 16, 2013 3:53 pm

eckythump wrote:
dom wrote:disable_camera_led=1 in config.txt may be useful.
yes, much neater than taping over it
I raise your tape with BluTac.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Contrary to popular belief, humorous signatures are allowed.
I've been saying "Mucho" to my Spanish friend a lot more lately. It means a lot to him.

User avatar
RaTTuS
Posts: 10601
Joined: Tue Nov 29, 2011 11:12 am
Location: North West UK
Contact: Twitter YouTube

Re: close ups (closer ups) with cheap eye glass

Thu May 16, 2013 4:20 pm

I'm just changing my blu tak to gripping hands ....
How To ask Questions :- http://www.catb.org/esr/faqs/smart-questions.html
WARNING - some parts of this post may be erroneous YMMV

1QC43qbL5FySu2Pi51vGqKqxy3UiJgukSX
Covfefe

eckythump
Posts: 14
Joined: Thu May 16, 2013 2:21 pm

Re: close ups (closer ups) with cheap eye glass

Thu May 16, 2013 5:40 pm

here is a picture of a fiver, using the plastic eyeglass, near the top of Elizabeth Fry's hat, the divisions on the ruler are millimetres
fiver3.jpg
fiver3.jpg (62.29 KiB) Viewed 2096 times

Return to “Camera board”