• Basic forms
• 写す — to copy; to photograph; to project / base form
• 写します — (I) copy; (I) take a picture / masu form
• 写した — copied; photographed / ta form
• 写して — copy and …; please copy / te form
• 写さない — do not copy; don’t take a picture / negative
• 写せば — if (you) copy; if (you) take / conditional
• 写せ ・ 写しなさい — copy it!; take a picture! / imperative
• Other common forms
• 写真を写したい — want to take a photo / 〜たい form
• 黒板をノートに写せる — can copy the blackboard into the notebook / potential
• メモに写せた — was able to copy it into my notes / past potential
• うまく写せない — can’t photograph it well / negative potential
• More
• きれいに写そう — let’s take a nice picture / volitional
• 写さなかった — didn’t copy; didn’t photograph / past negative
• 写真を写している — is taking photos; is copying / progressive

写す（うつす） is a godan verb ending in す. It is transitive: you actively copy or photograph something.

• Basic forms
• 写る — to be photographed; to be reflected / base form
• 写ります — appears in a photo; is reflected / masu form
• 写った — appeared; was captured / ta form
• 写って — be showing; be reflected and … / te form
• 写らない — does not appear; doesn’t come out / negative
• 写れば — if it appears; if it comes out / conditional
• 写れ — appear! / imperative
• Other common forms
• 写真に写る — to appear in a photograph
• 鏡に写っている — is reflected in the mirror
• よく写っていた — came out well in the picture
• More
• 写ろうとしている — is about to be captured / volitional
• 写らなかった — didn’t appear; didn’t show up / past negative

写る（うつる） is an intransitive godan verb. The subject itself is captured or reflected (e.g., getting in the photo).