Want to be featured on 500px ISO? Every week, we’ll announce a new photo challenge theme. You’ll have until next Monday to submit your photo as an entry. You may already have an existing photo that fits the theme, or you can take this as a challenge to shoot and upload a new photo.

To skip to the new theme for next week, click here.

Last Week’s Winning Autumn-Themed Photos
Autumn is finally upon us! And nothing puts is in the mood for fall like a good photo. Last week, we asked you to capture pictures that portray the magical Autumn season, and share them with us. We have received more than 400 entries—thanks to those who got creative and submitted their inspiring work! We’re especially delighted to see a lot of postcard-perfect panorama entries.

Feeling Fall? Scroll down to see 35 of the 500px team’s favorite images from the contest gallery—from eye-catching landscapes to pretty portraits.

Awesome Subscription Giveaway Winner
As always, we hold a random draw giveaway for all those who enter the contest. Anyone who enters will have the chance to win two months of free Awesome membership! This week’s lucky random winner is Sham Jolimie. Congrats, we’ve upgraded your account!

Next Week’s Theme: Mobile Photography

1. For this theme, your photo must be shot with a mobile phone, so make sure to fill out your phone camera details on your 500px photo page. That, way we can check it. See the screenshot below:

Rule #3 example

Fill out the camera details with your mobile phone model.

2. Select a photo that fits this theme. Upload the image, or pick a photo you’ve already uploaded.

3. You are allowed to enhance your mobile photos further with processing tools or Adobe Photoshop.

4. Add the tag #500pxMobile. To learn how to add tags to your photo, click here.

5. You’re done! Track all entries here.

As the adage goes, the best camera is the one that you have with you. For some photographers, it’s their mobile phone, capturing inspiring places, faces, and moments while they’re on the go.

Plus, early today, Apple just announced the upcoming iPhone 6 and iPhone 6 Plus. It got us pretty excited about the enhanced capabilities of these iPhones’ 8-megapixel cameras, like optical image stabilization, faster autofocus system, and many other improvements from previous models.

You can shoot and submit an entry of any subject, from landscapes to portraits to still-life, as long as it is shot on a mobile camera phone. You may also enhance your photos further with other processing tools or Photoshop. So grab your phone, start shooting, and tagging now! For inspiration, you can look through these photos shot and processed with an iPhone:
45 Striking Landscape Photos Shot With An iPhone
iPhone 4 on 500px.com
iPhone 5 on 500px.com
Nokia Lumia 1020 on 500px.com

Deadline is September 15th at 11:59PM PT. Good luck, everyone! We’re excited to see the awesome shots you come up with, using only a mobile device.