Daniel Reetz, the founder of the DIY Book Scanner community, has recently started making videos of prototyping and shop tips. If you are tinkering with a book scanner (or any other project) in your home shop, these tips will come in handy. https://www.youtube.com/channel/UCn0gq8 ... g_8K1nfInQ

iPhone 6s third-party lenses

Everything camera related. Includes triggers, batteries, power supplies, flatbeds and sheet-feeding scanners, too.
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digitalgnome
Posts: 2
Joined: 29 Jun 2017, 08:50
E-book readers owned: iOS, Android both using Kindle and PDF
Number of books owned: 200
Country: UK

iPhone 6s third-party lenses

Post by digitalgnome » 01 Jul 2017, 14:44

Hello all

I have just built a cardboard book scanner and its working great with a borrowed DSLR camera.

However, with my iPhone, due to the tripod and distance from the book, I am relying on digital zoom which isn't getting the best results.

I am thinking of getting a third-party optical lens for it but I am not sure what to get.

Could anyone recommended something please?

I was going to look at macro lenses not sure if this is right path to go down.

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Mohib
Posts: 87
Joined: 05 Apr 2014, 21:15
Number of books owned: 0
Country: Canada

Re: iPhone 6s third-party lenses

Post by Mohib » 01 Jul 2017, 21:04

I've been looking at these for smartphone scanning as well to avoid using digital zoom. However, results are acceptable even from an iPhone 4s (see samples I've posted here: viewtopic.php?f=14&t=3401) with upto 2x digital zoom (depending on what you're trying to accomplish).

The zoom smartphone lenses are pretty useless from what I've seen. Image quality suffers greatly as you move away from the centre and, given we want to scan text, image quality is essential (even if we assume we'll lose 15% of the field of view).

Telephoto is probably what you need (you can tell exactly if you put your phone on the scanner and see if you need to zoom in to get the page to fill the image). That said, prices for a good lens range all over the map, from $20 to $200.

Here are reviews of the 3 best I've found (I'll be getting the Aukey telephoto myself -- based on the excellent test chart image at the review below):

Aukey ($20 for 2x zoom -- they also have a 3x which I think will be too much zoom)
https://photographylife.com/reviews/auk ... amera-lens
https://www.aukey-power.com/index.php?r ... y&path=225

Moment ($100)
http://www.thephoblographer.com/2015/06 ... -and-tele/
https://www.shopmoment.com/shop/

Zeiss ($200)
https://www.youtube.com/watch?v=-_zN95IObCA&t=473s
https://exolens.com/discover-zeiss/

digitalgnome
Posts: 2
Joined: 29 Jun 2017, 08:50
E-book readers owned: iOS, Android both using Kindle and PDF
Number of books owned: 200
Country: UK

Re: iPhone 6s third-party lenses

Post by digitalgnome » 02 Jul 2017, 12:29

Wow love your set up mine isn't quiet as advanced as that.

Maybe I will design something to suit my books and workflow after some more practice.

I have tried the Camera Plus APP with ISO 50 and high res JPEG its a bit better.
I might try TIFF later as I have 128GB and its syncing to a NAS box on my home network.

Already have a remote which works great with the phone.

Going to bite the bullet and try the Aukey telephoto myself as the price is very reasonable.

Many thanks

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