Dr. EFLenses PRO Released!

We are releasing Dr. EFLenses PRO 1.0.1 today, finally!
There are four major differences between the PRO and free version, which are:
1) Including discontinued lenses,
2) Comparison of multiple lenses,
3) Owned and wish list,
4) No advertisement of any kind.

Since this Dr. EFLenses PRO is a paid app, we treat every customer's suggestion and bug report seriously. Please give us feedback here at this blog immediately if you encounter the following issues:
1) You have a discontinued lens that is currently not in the list.
2) Bug report, please describe your environment (brand and model of your phone), the sequence you have done and the result of it (crash or weird condition).
3) Suggestion of functionality.

Thank you for your support.

The hyperlink to the app at Google Play
https://play.google.com/store/apps/details?id=com.ejs.dreflensespro

Dr. EFLenses 0.7.0 FAQ

1. How do I add lenses into "My Lenses" or "Wish List"?

While on "Lens List" tab, touch and hold-down (long press) on a lens till pop-up menu shows up.
There are several options such as "I Have One" and "Add to Wishlist". Click it and the lens will be added to the list and brings you to the corresponding tab. When you want to go back to "Lens List", you can either click the "Lens List" tab or BACK button.

Dr. EFLenses 0.7.0 Released!!

The major improvement of this version is the "My Lenses" and "Wish List" lists. You can save the lenses you already have to "My Lenses" list for faster look-up. You can also place some of the lenses you are considering into the "Wish List" for convenient access.

There are information for the two just-released lenses within this update: Canon EF24-70 F4L IS USM and Sigma 35mm F1.4 DG HSM.

The plan for releasing Dr. EFLen

ses PRO version is on schedule, we expect to have the first release before Armageddon in case something really happens. There are at least two new functions that is never been seen anywhere else.


Please let me know if you have any function suggestions!

Dr. EFLenses App: First Release

The very first version of Dr.EFLenses is released!!
This App is actually the best of it kind either on Android or IPhone.
It list all lenses that compatible with Canon EF or EF-S mount that manufactured by
Canon, Sigma, Tamron, Tokina and Carl Zeiss.
It not only the first app listing lenses not only by Canon but also the first one with
detailed technical information of the lens.

Is's now available on Google play, please click the link below:
https://play.google.com/store/apps/details?id=com.ejs.eflenses

If you have any issue while using this app, please email me or leave comments at this post:
Dr. EFLenses APP: Bug Collector

If you found out that some of the lenses information is not correct, please leave comments at this post:
DR. EFLenses App: Lenses Data Error Report Center

For all the translation issues, please visit this page:
Dr. EF Lenses App: Language Translation

Thank you so much!!!!

Dr. EFLenses APP: Bug Collector

If you got any problems while using this App regarding stability of the software it-self, please email me or leave a comment down below. Although the goggle play has a mechanism to report crash report, however, sometime these information does not sufficient to determine the cause of a bug.

Currently there is one bug that I have trouble identifying it, which is causing the app to crash while doing lens comparison. If you encounter this problem, please provide your android version, which lens are you reading, and a short description the situation.

Thank you so much!!!

Dr. EFLenses App: Language Translation

The first version of EF Lenses only provide two languages, these are English and Chinese.
Japanese Korean and Germany are in the stage of development,
which means if you are using these languages as your default language,
you may see some of the text in these languages and some are still in English.

If you are kindly want to translate some of the text or the translation is not correct or good enough,
please leave it here as comment :D

Thank you so much!!

Dr. EFLenses App: Lenses Data Error Report Center

This is the official window to report if a lens' information is inaccurate.
Please leave the brand, model, and the data that is inaccurate down at the comment area,
and I'll making the necessary modification in the next version update!

Thanks for using my App and take the time to report these issues!