---
title: "Macro Photo"
type: "article"
slug: "macro-photo"
url: "http://localhost/article/macro-photo/"
markdown_url: "http://localhost/article/macro-photo.md"
published_at: "2020-10-27T17:19:02+00:00"
modified_at: "2024-06-23T07:49:05+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "This program will allow the photographer to input the data which the ZX81 will use to figure the adjusted exposure time (for bellows length and reciprocity), the proper subject to lens distance, and the proper film to lens distance for a given image magnification."
category:
  - name: "SYNC"
    slug: "sync"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/sync/"
post_tag:
  - name: "1983"
    slug: "year-1983"
    taxonomy: "post_tag"
    url: "http://localhost/tag/year-1983/"
  - name: "Type-in program"
    slug: "type-in-program"
    taxonomy: "post_tag"
    url: "http://localhost/tag/type-in-program/"
  - name: "ZX81"
    slug: "zx81"
    taxonomy: "post_tag"
    url: "http://localhost/tag/zx81/"
model:
  - name: "Sinclair ZX81"
    slug: "zx81"
    taxonomy: "model"
    url: "http://localhost/model/zx81/"
indiv:
  - name: "Samuel Giannavola"
    slug: "samuel-giannavola"
    taxonomy: "indiv"
    url: "http://localhost/indiv/samuel-giannavola/"
publication: "Sync"
publication_r:
  id: 10243
  title: "SYNC"
  type: "periodical"
  url: "http://localhost/periodical/sync-magazine/"
authors: "Samuel Giannavola"
volume: "3"
issue: "2"
issues_articles:
  - id: 26648
    title: "SYNC v3 n2"
    type: "issue"
    url: "http://localhost/issue/sync-v3-n2/"
pages: "34"
pubdate: "March/April 1983"
archive_link: false
volumeissue: "v3n2"
---

# Macro Photo

This program will allow the photographer to input the data which the ZX81 will use to figure the adjusted exposure time (for bellows length and reciprocity), the proper subject to lens distance, and the proper film to lens distance for a given image magnification.