Baja de oficio Means he probably worked formally once some years ago but due to inactivity his tax registration is no longer valid . He ' s probably just a bump . Still could be working as a dependant though . <| sep |> Jesus Christ what a hateful irrelevant piece of crap to post in response to this article . I feel like you need help . <| sep |> A good guide but this bit Work in batches of five . It ' s easiest to have 5 film holders . Not 4 , and not 6 that way you don ' t have any half used boxes of new film . With 5 film holders you use a full box of film . There ' no left overs which will eventually get confused and processed as blanks or get mixed up and double exposed . So long as you use only 5 fillm holders and only change load film in a bull new batch you wont have this problem . Both boxes I have on me are 25 sheets and looking at BH it seems that only Portra and Ektar come in 10 sheets , the rest look to be 20 or more , so this is kind of redundant unless you ' re shooting one of those two films . I ' ve got two holders and never had an issue with it as long as you have an empty box and clearly label it with EXPOSED on the front so you know which is which .