Ubwenge busanzwe bwo gufata ibirahuri
1. Mugihe wambaye kandi ukuraho ibirahure, nyamuneka fata ibirenge byurusengero ukoresheje amaboko yombi, ubikure imbere, hanyuma wambare kandi ukureho ibirahuri ukoresheje ukuboko kumwe, bishobora gutera byoroshye guhinduka no kurekura.
2. Mugihe udakoreshejwe, funga umwenda wa lens hamwe na lens ireba hejuru hanyuma uyishyire mumufuka wihariye kugirango wirinde ko lens hamwe na kadamu bidashushanywa nibintu bikomeye.
3. Niba ikadiri cyangwa lens byandujwe n ivumbi, ibyuya, amavuta, amavuta yo kwisiga, nibindi, nyamuneka ubisukure ukoresheje amazi atabogamye hamwe namazi ashyushye, hanyuma uyumishe nigitambaro cyoroshye.
4. Birabujijwe gushiramo amazi igihe kirekire, cyangwa kuyashyira ahantu hateganijwe kugirango izuba;birabujijwe kubishyira kuruhande rwumuriro wamashanyarazi nicyuma igihe kirekire.
5. Mugihe ufunga indorerwamo, nyamuneka ubanze uzenguruke ikirenge cyibumoso.
6. Ikadiri yerekana ibintu bigoretse kandi bigabanuka, kandi iyo byongeye gukoreshwa, ubwumvikane buke bwa lens buzagira ingaruka.Nyamuneka jya mububiko bwo kugurisha kugirango uhindurwe kubuntu.
7. Amadarubindi y'izuba arashobora guhindurwa gato nyuma yo gukoresha mugihe runaka.Ibi ni ibintu bisanzwe.Urashobora kujya mububiko bwo kugurisha kugirango uhindure ikadiri.
8. Nyamuneka ntusige indorerwamo ya fotokromique mumwanya wizuba ryizuba umwanya muremure, bitabaye ibyo igihe cyo gukoresha ingaruka zifotora kizagabanuka.