Best you check the post from @juanmiguelsalas below - he explains en detail. You can directly post to Steepshot / Steemit by using it on Telegram.

https://steemit.com/steepshot/@juanmiguelsalas/review-of-the-bot-for-telegram-of-the-steepshot-application-the-fastest-way-to-post-a-photo-on-steem-s-blockchain